Cheryl Cole’s success on The X Factor has helped chart act Girls Aloud to amass a combined fortune of £30 million, new figures reveal.

The brunette star’s wealth – thanks to her ad deals, X Factor judging and successful solo career – has rocketed by 150 per cent in the past year to £10 million.

And figures to be published in the new Sunday Times Rich List show her bandmates Nadine Coyle, Sarah Harding, Nicola Roberts and Kimberley Walsh each have around £5 million thanks to their string of hits.

Cheryl is ranked number four in the rich list for music millionaires under 30, jointly with singer Katie Melua.

The No 1 slot is jointly held by Leona Lewis, Charlotte Church and last year’s top young music earner Katherine Jenkins.

They are each on £11 million with Leona moving up from last year’s number six with a 38 per cent rise in wealth. Katherine went up £2 million (22 per cent) while Charlotte remained steady.

The 22nd annual Sunday Times Rich List is published on Sunday profiling the wealthiest people in the UK and Ireland.