Hundreds of people gathered in Hyde Park on Sunday morning to take part in Race For Life For Sarah, a Cancer Research 5k run in memory of Girls Aloud member Sarah Harding.
Harding died at the age of 39 in September, a year after revealing she had breast cancer.
Her bandmates Nicola Roberts, Cheryl and Nadine Coyle were at the event wearing pink T-shirts with Race For Life wording.