The Sound of the Underground hitmaker who shot to fame on Popstars: The Rivals in 2002, pushed Pop idol Will Young to second place with the fortune of 12.5m pounds.
X-factor winner Leona Lewis came third in the list with 10m pounds, reports The Sun.
And Big Brother legend Jade Goody, who died from cervical cancer, came fourth with 8m pounds, most of which she made from TV, DVDs, perfumes, books and magazine deals.
Myleene Klass of Popstars, Gareth Gates of Pop Idol, Paul Potts of Britain''s Got Talent, Craig Phillips of Big Brother, Lemar of Fame Academy and Jane Mcdonald of The Cruise wrapped up the top ten.
The list complied by Current TV was created following discussions with talent agents, production companies, accountants and journalists.
The Top 10 are:
1 Girls Aloud (25m pounds) Popstars
2 Will Young (12.5m pounds) Pop Idol
3 Leona Lewis (10m pounds) X Factor
4 Jade Goody (8m pounds) BB
5 Myleene Klass (7.5m pounds) Popstars
6 Gareth Gates (6.5m pounds) Pop Idol
7 Paul Potts (5m pounds) BGT
8 Craig Phillips (5m pounds) BB
9 Lemar (4m pounds) Fame Academy
10 Jane Mcdonald (3.5m pounds) The Cruise
Text: ANI | Image: Girls Aloud