A fundraising gala will be held in honour of the late Sarah Harding next month by her bandmates from Girls Aloud.
It comes after the girls did a charity run in July in tribute to Sarah - who died aged 39 last year after being diagnosed with breast cancer, which spread to other parts of her body.
Her former bandmates Cheryl, 39, Nadine Coyle, 37, Nicola Roberts, 36, Kimberley Walsh, 40 will now host the Primrose Ball at the Londoner hotel on October 8.
The charity gala in central London will raise funds for the Christie NHS Foundation Trust and Cancer Research UK, as part of the Sarah Harding Breast Cancer Appeal.
Whilst the event will be hosted by the rest of Girls Aloud - who were formed in 2002 - it will be presented by Fearne Cotton, 41, with Johnny Gould hosting a live auction.
It will feature performances from the likes of Years and Years' Olly Alexander, 32, and the auction will include an original canvas depicting Sarah by artistic duo the Connor Brothers.
The line-up also includes Kaiser Chiefs frontman Ricky Wilson, 44, and The Pretenders' Chrissie Hynde, 71, who are among those due to perform at the charity event.
The Primrose Ball has been organised at the request of Sarah and is named after her lyrics in Girls Aloud's chart topper The Promise - in which she sings: "Here I am, walking Primrose".
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Her former bandmates said in a statement about the upcoming fundraising gala: "We are so grateful to The Londoner for hosting the Primrose Ball at their wonderful hotel."
"Charles Oak, hotel director of The Londoner, and Sarah had a very special bond and holding her gala evening there will make the night even more special," they further stated.
They added: "Our hope is to raise a huge amount of money that will hopefully prevent other people finding themselves in the same terrifying situation Sarah found herself in."
Cheryl, Nadine, Nicola and Kimberley took part in a Race for Life for Sarah fundraiser a few months ago, which celebrated her life and raised money for breast cancer charities.
The Sarah Harding Breast Cancer Appeal aims to fund research to identify new ways to predict which young women, with no family history of breast cancer, are likely to develop the disease, ensuring people can be identified earlier when treatment is more likely to be successful.
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