Both singers have amassed a fortune of £5million, according to The Sunday Times.

Charlotte Church, Katherine Jenkins and Leona Lewis topped the newspaper’s annual young persons Rich List with £11million.

Girls Aloud star Cheryl Cole is the biggest mover, increasing her wealth from £4million to £10million.

The 150% increase is due largely to Cole’s role as a judge on The X Factor and various sponsorship deals.

Other names on the list include Craig David - the highest placed male - with £8million and Natasha Bedingfield with £6million.

Sarah Harding, James Morrison and Paolo Nutini are among those in a tie for ninth with Winehouse and Allen.

(by Jason Gregory)