Big Brother (Australian season 7)
Big Brother Australia 2007, also known as Big Brother 7, was the seventh season of the Australian reality television series "Big Brother". Episodes were broadcast on Network Ten in Australia, and the first episode aired on 22 April 2007. 
Despite a drop in ratings compared to previous series, and a number of controversies, the then "Big Brother" executive producer Kris Noble considers the year's series a success. At the end of this season's finale broadcast 30 July 2007, it was announced by host Gretel Killeen that "Big Brother" would be returning for an eighth season in 2008. In the finale Aleisha Cowcher was announced winner of "Big Brother Australia 2007". She won by the closest winning margin ever in the Australian series. The news the following day reported a margin of 51% versus 49% – a difference of 65 votes. This was the last season hosted by Gretel Killeen.
Big Brother (UK TV series)
"Big Brother" reality series was initially created by John de Mol and premiered in the Netherlands. Following the success of the series, it was confirmed that editions for both the United Kingdom and the United States were in the works. In March 2000, it was revealed that the series would be broadcast by Channel 4 and E4. Casting for the series began shortly afterwards. Davina McCall was later revealed to be the presenter for the series. The first series premiered on 18 July 2000, and ended when housemate Craig Phillips was crowned the winner after 64 days in the House. The series proved to be a hit early in its run, leading to a second series. "Big Brother 2" premiered on 25 May 2001, and continued to have the success of the previous series. The series concluded on 27 July 2001, when Brian Dowling was crowned the winner. The third series premiered on 24 May 2002, and was the first series to feature a live premiere. Much like the previous series', the show lasted for 64 days, and saw Kate Lawler win the prize. With the third series finding even more success than its predecessors, a fourth series began on 23 May 2003. The series was one of the first to feature numerous twists throughout the series, including nominations on the first night and swapping a housemate with a housemate from the African edition of the series. The series concluded after 64 days, with Cameron Stout being crowned the winner. Despite the fourth series seeing a decrease in viewership and voting numbers, a fifth series began on 28 May 2004. The series became one of the most controversial series at the time, mainly due to events such as "Fight Night" and the expulsion of two housemates. The series lasted for 71 days, with Nadia Almada becoming the first transgender housemate to win the series.