Girls Aloud stars Cheryl, Nadine Coyle and Nicola Roberts led the runners in a special Race for Life event in memory of teammate Sarah Harding.
Hundreds of people, many wearing wigs and pink tutus, took part in Sarah’s 5K Run for Life around London’s Hyde Park.
Harding died aged 39 in September last year – a year after revealing she had an aggressive form of breast cancer.
She documented her journey with the disease in an autobiography, published in March 2021, titled Hear Me Out.
In it, she explains how she decided to go public with the disease to encourage others to seek help – who might not otherwise have done so due to the coronavirus pandemic.
On Sunday, Cheryl told her fellow runners that she still had a hard time believing Harding was gone.
“You feel so helpless, you’ve never felt despair like this, it’s horrible,” she added.
“So the fact that she had a request that we could fulfill is great for us because it feels like we’re doing something.”
Coyle added that she had been “in denial” after his death, which Roberts said made the whole group “worried”.
One participant, Megan, who lost her grandfather and a close family friend to cancer, said on Twitter: “I was devastated when I heard that Sarah had passed away from cancer.
“I realized that cancer can affect anyone, no matter how successful or famous you are.
“I grew up listening to Girls Aloud and Sarah was my favourite. So when I saw the ad for the Race for Life for Sarah event I knew straight away it was something I could do. .”
Girls Aloud’s fifth star, Kimberley Walsh, was absent but said she would attend another similar event.
A grand ‘industry-led’ fundraising gala will take place later this year
Earlier this year, the four women revealed that they would face a series of events to raise funds for cancer research.
They will culminate in a “grand, industry-led gala dinner…which will be aimed at supporting Sarah’s wish,” the singers said in a statement.
How Sarah Harding became one of Britain’s brightest pop stars
Sarah Harding’s life in pictures
Cancer activist last month Lady Deborah James died after raising over £7million for cancer research with her Bowel Babe fund.
The former director launched the crowdfunder as she announced she was moving into palliative home care.
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