Lady Gaga, Justin Bieber and British singer Adele have been named the year's highest achievers under the age of 30.
 
The singers feature in the list put together by Forbes magazine, which names those most likely to influence the world in the immediate future, and tomorrow's brightest stars.
 
The music list also features Katy Perry, Rihanna and rapper Lil Wayne, while the entertainment category includes Jonah Hill, Jennifer Lawrence and 13-year-old Jaden Smith, son of Hollywood actor Will Smith.

Slideshow: Lady Gaga's Eccentric Fashion