Amy Winehouse is the Brit School's most successful alumnus, beating fellow graduates including Leona Lewis and Adele to the punch.
Research by the Official Chart Company and Music Week found that of all the stars who started out at the prestigious school for performing arts in Croydon, Winehouse has sold the most records.
The singer's second album, 2006's Back to Black, is the top-selling album of any of the Brit School's former students.
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As the school celebrates its 20th anniversary this week, it has been revealed that its former students have collectively sold more than 65 million albums.
The school's influence over Britain's musical landscape is significant, considering that those former students include The Kooks, Kate Nash, Katie Melua and Jessie J.
Leona Lewis sold the second-most albums with her 2007 album Spirit. Adele came in third with her latest album 21, and her single 'Someone Like You' is the Brit school's biggest-selling single.
Since the school opened in 1991, its intake has grown from 300 to 1000 full-time students, all aged between 14 and 19.
Britain's record industry and even the Brit Awards help fund the school.
The Brit School teaches the national curriculum as well as tutoring students in a chosen creative field.
