Singers Lady Gaga, Justin Bieber and Katy Perry have topped the list of Forbes' Best-Paid Celebrities Under 30.

Lady Gaga, 25, took the number one spot after she earned $ 90 million through her 'Monster Tour' as well as other album sales, the Daily Telegraph reported.

The Poker Face singer took the spot from Beyonce, who last year had earned $ 87 million but who this year fell to number eight after earning just $ 35 million.

Seventeen-year-old Canadian singing sensation Justin Bieber took second place after raking in $ 53 million.

Basketball player LeBron James, who earned $ 48 million, followed him.

R&B singing diva Beyonce, 29, who's often featured on the top stop on the list, slipped to the eighth position with $35 million.

She came in after Real Madrid soccer star Cristiano Ronaldo, 26, with $38 million.

Twenty-three-year-old singer Rihanna features in the list with $29 million in earnings.

The top ten list was rounded off by Barcelona soccer star Lionel Messi, 23, with $ 32 million and tennis star Rafael Nadal, 25, with $ 31 million.