
Cheryl Cole was the largest contributor to the group's fortune, with her stints on ‘The X Factor’, product endorsements and solo career seeing her wealth rocket 150% in the past year to £10 million.
The boost takes her to fourth place in the list of British music millionaires under 30, which she jointly holds with singer Kaite Melua.
Her bandmates Nadine Coyle, Sarah Harding, Kimberly Walsh and Nicola Roberts have each made around £5 million from record sales.
The figures have been released ahead of this weekend's ‘Sunday Times Rich List’. Leona Lewis, Charlotte Church and Katherine Jenkins share the top spot, each worth £11 million. Craig David is the wealthiest man in seventh place at £8 million, with Paolo Nutini at ninth with £5 million