Pop star Kylie Minogue has pulled out of a concert in Manchester halfway through because of ill health.
The singer underwent surgery for breast cancer in Australia
The Australian singer ended her concert at the city's MEN Arena after just one hour, telling fans she had flu.
Minogue, 38, launched the UK leg of her Showgirl Homecoming Tour on New Year's Eve, following her recovery from treatment for breast cancer.
A decision about her further four dates in Manchester will be made on Sunday, her tour manager said.
Minogue has already played seven dates at Wembley Arena which were to be followed by six concerts in Manchester.
Jason, one fan at the city's MEN Arena concert, told BBC News 24 that from the start of the concert the singer seemed to be "lacking in energy".
She then admitted to the audience that she was struggling with flu, he said.
Oz, another concert-goer, said: "She announced that her voice wasn't going to make it, and therefore she was going to have to do one last song.
"Eventually she came up with her sister and they did a great finale, but then off she went. The crowd were distraught."
Alex Stanger, from the BBC's Entertainment 24, said the concert was a "very important show" for the singer.
But she said Minogue's manager had confirmed the cancellation had been down to flu and that she was too tired to continue the concert.
Some other members of the crew had also had been ill, she said.
Ms Stanger added: "She's had a very busy week this week. She has not only had her new live album come out, she's been at Wembley laying a foundation stone with her handprints in, she's been launching her fragrance and a new waxwork has been unveiled.
"It's a very busy time for her in the spotlight."
The singer began the run of concerts in Manchester on Friday.
Minogue had been forced to postpone her original Showgirl world tour after her breast cancer diagnosis in May 2005.
Minogue underwent surgery in Australia two days later and finished her chemotherapy in December 2005.
It had been hoped she would also play at this year's Glastonbury festival, after pulling out of a headlining slot in 2005 following her cancer diagnosis.
But earlier this month festival organiser Emily Eavis told BBC 6 Music Minogue was too busy to join this year's line-up.
Minogue's record company, Parlophone, has also said she is working on material which could be released in 2007.
Were you at the concert or do you know someone who was? Send us your experiences using the form below.
Just returned home from the concert. Kylie was incredibly brave to try to continue with the concert as long as she did. I would have been happy for her to mime through the rest of it, but only Kylie knows how ill she feels.
Allan Bird, Warrington
Just got home from the MEN, disappointed not to have seen the full show but Kylie's health comes first. The performance she gave was fantastic and she obviously did not want to let her fans down. She did say that the fans should not worry and it was just a cold.
Lizzie, Bury, Lancs
Kylie performed for just over the hour and it was obvious she was not right. Not sure if we will get money back or option to see her again? Really wanted to see her concert she is so brave after what she has been through.
Matt Berrey, Droitwich
Kylie love you loads you are a genuine star. Get better soon
I paid £55 each for 6 tickets, it's a total disgrace. She said she was ill after the first song so she should have given up then rather than give the audience a half hearted 30 minutes.
Mike Edge, Manchester
Just been to the concert. Gutted! Kylie looked genuinely upset to be pulling out, and her sister joined her for the last song, a version of Kids. Still can't believe it, hope she gets better soon.
Claire Davies, Manchester, UK
Just heard from my wife and her friends who have travelled up to Manchester today from Wiltshire. They are all devastated - they've waited for years to see her. Hope Kylie makes a speedy recovery
Matt, Chippenham, Wilts
The BBC may edit your comments and cannot guarantee that all emails will be published.