from Vanessa Feltz' meltdown to Kim Woodburn being hauled out by security
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Celebrity Big Brother reached its landmark 20th series last year but we have still seen big things in 2018.
A host of stars from TV, music, film and even YouTube have voluntarily committed themselves to being locked away for weeks for a chance to boost their star power (and bank some easy money).
But in the 17 years since Celebrity Big Brother first launched there have been some seriously high drama and jaw dropping moments.
Here are the top most shocking moments from every series of Celebrity Big Brother so far.
Series 1: Vanessa Feltz' meltdown
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Back when Celeb Big Brother first launched in 2001, the contestants were taking part to win money for charity and the show lasted just eight days.
But eight days was all it took for Vanessa Feltz to crack up - well, even less, actually, as she flipped on Day 3 when she was nominated for eviction and started scrawling obscenities on the kitchen table in chalk (while dressed in animal print and wearing shades) - and totally ignoring Big Brother's demands to stop.
Jack Dee - who won the show - also caused a stir when he escaped for an hour, with security failing to find him.
Series 2: Les Dennis' depression
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While nothing too outrageous happened during series 2 of CBB in 2002, it was clear for anyone watching that Les Dennis was a broken man.
He entered the house following the collapse of his marriage to Britain's Got Talent babe Amanda Holden, and it seemed he was not himself.
He later commented that entering the house was not his "wisest move," but he was placed second behind Take That's Mark Owen.
Series 3: Jackie Stallone's grand entrance
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Brigitte Nielsen got the fright of her life when ex-mother-in-law Jackie Stallone entered the house on day five in the middle of a task (her "yeah, Jackie" introduction has gone down in CBB legend).
Brigitte gave a master class in acting as she managed to feign surprise and excitement to see the woman that she blamed for the collapse of her marriage to Sly Stallone before dashing to the Diary Room to express her complete shock - and threatened to walk.
However, the two women managed to resolve their issues.
The series also left some viewers revolted by John McCririck - who many regarded as misogynistic - and Germain Greer became the first housemate ever to quit the show on the grounds of Brigitte and John being bullied by the other housemates and producers.
Series 4: Pete Burn's animal jacket
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The late Pete Burns courted controversy when he entered the CBB house in 2006 wearing what he claimed was a gorilla skin jacket.
Police were called to the house and tests were done on the jacket - which revealed it was actually made of Colobus monkey skin (another endangered animal), but charges were not brought as the jacket was proved to be vintage and made before the importation of Colobus fur was made illegal.
Further controversy occurred that series when Faria Alam - famous for having an affair with Sven-Goran Eriksson - claimed she had been nominated for eviction because she was Asian - sparking the first Celebrity Big Brother race row.
Series 5: Jade Goody's racism shame
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By far the most shocking moment in Celebrity Big Brother history was in 2007 during series 5 when Jade Goody along with Danielle Lloyd and Jo O’Meara were accused of being racist following their persistent bullying of Shilpa Shetty.
The abuse made uncomfortable viewing - with Ofcom receiving more than 44,500 complaints and eventually ruling Channel 4 (who aired the show at the time) had breached rules.
The incident sparked international outrage, prompted a response from both the UK and Indian governments, and led to Celebrity Big Brother being cancelled in 2008.
Shilpa went on to win CBB, publicly forgave Jade for her involvement in the arguments, and became something of a UK National Treasure.
Jo O’Meara said in later interviews she was left on the verse of a mental breakdown after receiving death threats following her time on the show, while Danielle Lloyd escaped the brunt of the backlash (even making it to the final).
Jade’s career was ruined, and while trying to rebuild it she appeared on India’s version of Big Brother in 2008 - but left the house on Day 2 after learning she had been diagnosed with cervical cancer, and later died on 22 March 2009.
Series 6: Coolio harasses Mutya Buena
Celebrity Big Brother was resurrected in 2009 for series 6 - but was not without controversey.
Sugababe Mutya Buena sensationally quit the show on day 15, having just survived an eviction.
While she said “homesickness” was the reason for her decision to walk from the house, in an interview with the Daily Mail hours later she revealed she had been made to feel uncomfortable by fellow housemate Collio.
“He’s a sex pest who would perv on me all the time. It just made my skin crawl,” the pop singer - then 23, while Coolio was 45 - said.
Series 7: Vinnie Jones' disability slur
Series 7 in 2010 (and won by Alex Reid after 27 days) sparked outrage during the live final when runner up Vinnie Jones accused Davina McCall of “walking like a retard”.
The comment brought heavy criticism from disability charities and members of the public - but it took almost two weeks before Vinnie and Davina both apologised for the comment.
Series 8: Kerry Katona and Lucien Laviscount's fauxmance
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Celebrity Big Brother showmance’s might be routine these days, but one of the earliest was when Kerry Katona and Lucien Laviscount dived into a relationship while appearing on the show in 2011 (the first series to air on Channel 5).
The romance has gone down in history as one of the most obviously fake during the course of CBB.
Since leaving the house, both have endured different fates - with Kerry still trying to reclaim her fame in Atomic Kitten, while Lucien has started carving out a Hollywood acting career.
Series 9: Natalie Cassidy's a sore loser
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No one likes a bad loser, and Natalie Cassidy really took her eviction from CBB series 9 in 2012 badly.
After being shown the door following a double eviction on Day 16, she fumed: "Absolutely devastated…thank you so much for all your support…don’t know what went wrong…totally shocked” and used the hashtag #natshouldhavewon.
Series 10: MC Harvey's bum joke backfires
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MC Harvey caused outrage in the CBB house during series 10 (the first summer series ever).
While drunk, he exposed his buttocks to a shocked Coleen Nolan - and then proceeded to part his cheeks to make his flashing moment even more shocking.
Fellow housemate Martin Kemp told the rapper he had gone too far, blasting: "It was disrespectful what you did. There is ‘banter’ and then there is getting your a**e out and opening your cheeks and showing it all to Coleen."
The rapper - who claimed the stunt was a "joke" - was promptly told off by Big Brother in the Diary Room for his inappropriate behaviour.
Series 11: Rylan Clark walks out of the house
(Image: Enterprise News/Channel5)
Rylan Clark-Neal may be the kind of Big Brother’s Bit On The Side but he was also a contestant on series 11 in 2013 (fresh from X Factor failure).
While the music-show reject managed to glide to victory in the series, it wasn’t without raising eyebrows.
While appearing on CBB, it was revealed he was allowed to leave the house every Sunday to rehearse for The X Factor Live Tour.
Series 12: Lauren Harries pops some pills (into Courtney Stodden's mouth)
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Lauren Harries was the centre of a drugs shock in Celebrity Big Brother series 12 in the summer of 2013.
After Courtney Stodden complained of feeling ill, Lauren popped two pills into Courtney’s mouth and instructed her to swallow them down with a glass of water.
Lauren was then called to the Diary Room and reprimanded for sharing medication - while Courtney also revealed she faked swallowing the pills and binned them once Lauren was called away.
The incident led to an argument between Lauren and model Sophie Anderton, who blasted the antiques expert for “putting pills in people’s mouths, which is illegal”.
Series 13: The 'worst' contestant won
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Series 13 of Celebrity Big Brother proved to be so compelling that Channel 5 extended the number of episodes by two days as viewers lapped up the shocking behaviour of the most raucous housemates to date.
From Lionel Blair and Luisa Zissman losing all inhibitions during an S&M task, to the love triangle between Casey Batchelor, Lee Ryan and Jasmine Waltz , there were plenty of shocking moments.
However, perhaps most shocking of all, was when mysoginistic, dated, sexist and racist comedian Jim Davidson was crowned winner of the series - with the divisive star looking totally smug as he won.
Series 14: Kellie Maloney vs James Jordan
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Kellie Maloney may have witnessed a lot of fights in her years as a boxing manager, but nothing could have prepared her for the clashes she endured with Strictly dancer James Jordan in CBB series 14 (summer 2014).
The constant arguing made everyone in the house uncomfortable - as well as many watching at home - with James seemingly gathering more joy every time he managed to infuriate Kellie further.
After being evicted, Kellie told host Emma Willis she could see a lot of Frank (her former identity) in James, and warned he needs to “bury a lot of aggression”.
Series 15: Perez, police, and inappropriate touching
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Perez Hilton was determined to make Celebrity Big Brother ‘The Perez Show’ in 2015 during series in 2015 by acting as loud, rude, and obnoxious as possible to ensure he got as much air time as he could muster.
His plan somewhat backfired in the sense that, yes, he did draw the most attention - but this included the attention of the police who reportedly said they would question him if Katie Hopkins complained after he threatening to lick her.
Perez was evicted on Day 29 - with Hopkins coming second overall on Day 31 (while Katie Price won the show).
Meanwhile, Jeremy Jackson had earlier been thrown out of the house (and handed a formal caution from police) after he groped fellow housemate Chloe Goodman.
Series 16: Tila Tequila's Nazi past
Tila Tequila was one of the American contestants to enter Celebrity Big Brother on Day 1 of the competition during 2015’s series 16.
However she was also the first to be shown the door - but not via nominations.
The model was kicked off the show on the second day after it was revealed she had posted social media messages sympathising with Adolf Hitler ahead of entering the house - and had posed for photos in Nazi outfits.
Series 17 - "David is dead!"
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Tiffany Pollard was in hysterics when Angie Bowie quietly informed her that David was dead.
The sad news was that Angie’s husband - the late music legend David Bowie - had died at the beginning of 2016, but Tiffany mistakenly thought she meant fellow housemate David Gest.
Tiffany went through a full range of emotions as she thought David died in the CBB house - and was then confused to see him alive and well. Gest sadly died later that year.
The 2016 series is also responsible for the ongoing love story between Stephanie Davis and Jeremy McConnell .
Series 18 - Biggins the 'bigot'
Nazi references brought further controversy in 2016 during series 18 when Christopher Biggins was removed from the house after allegedly making revolting comments to Jewish contestant Katie Waissel.
He had earlier sparked outrage by making unfavourable comments about bisexuals.
Aside from Biggins’ unsavoury comments, series 18 caused shock via a different medium as ex-TOWIE hunk Lewis Bloor freely flashed his manhood around the house and shower.
Series 19: Kim Woodburn's explosive confrontation
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Stacy Francis sparked controversy at the star of 2017 during series 19 of CBB as she made a homophobic slur during conversation.
Outside of Stacy’s comment, there wasn’t too much controversy in the house - until Kim Woodburn sensationally entered on Day 11.
Her explosive arguments with Nicola McLean became instantly legendary - with security even wading in to break up one fight as she singlehandedly took on Nicola, Calum Best , Bianca Gascoigne , Chloe Ferry, and Jamie O'Hara in an argument - while Spencer Pratt gleefully watched all the drama unfold.