Sarah Harding died in 2021 after fighting cancer.
The group went to number one in 2002.
Harding was diagnosed with cancer just before Walsh found out she was expecting another child.
Bandmate Sarah Harding died of breast cancer last year.
The remaining four women are raising money in Sarah Harding's memory.
Harding died of breast cancer last year.
Sarah Harding died of breast cancer last year, at the age of 39.
Kimberley Walsh says Sarah Harding agreed to a Girls Aloud reunion before she died.
Sarah Harding's death is still taking an emotional toll on her bandmate Nicola Roberts.
John Hardman said he misses Sarah 'greatly'.
Girls Aloud star Harding died in September.
Over the last year we've said goodbye to some big names in the world of entertainment.
Nadine says Girls Aloud could be back as a four-piece for their 20th anniversary next year.
The TV presenter has said no one with cancer should blame themselves.
The singer said she's 'not emotionally, mentally or physically able to perform' this weekend.
The singer topped the charts with 'Wear It Like A Crown' and funds will go to The Christie Foundation NHS hospital in Manchester.
The 39-year-old revealed last year that she had been diagnosed with breast cancer.
The Girls Aloud star has died aged 39 following a year-long battle with breast cancer.
The Girls Aloud star took part in the fundraising show for cancer research.
The singer shared her news with her two young sons.
The singer is hoping to raise money for the centre where she has been receiving treatment.
The singer told fans last year that she had been diagnosed with breast cancer.
The Girls Aloud singer has released her book 'Hear Me Out'.
The star revealed her breast cancer diagnosis last year.
The former bandmates met up last year in the wake of Sarah Harding's cancer diagnosis.