Born 1997
The purple-bobbed heroine of Kick-Ass, Moretz has become a proto-style icon for those old enough to know better.
Sales clout Kick Ass became the top movie download after its release on iTunes. Moretz has since been cast in Scorsese’s Hugo Cabret. Photograph: Ferdaus Shamim/WireImage
Born 1998
Younger sister of Dakota, Elle, 12, has been acting since she was three and steals the show in Sofia Coppola’s Somewhere.
Sales clout Too early to predict her box office draw, but already has fashion kudos, wearing Chanel, Rodarte, Valentino and Marchesa to premieres. Photograph: Evan Agostini/AGOEV
Born 1994
Discovered on YouTube singing his little heart out, Bieber, 16, is the most Googled person on the planet with his own fanbase, the Beliebers.
Sales clout His second album, My World 2.0, topped the US Billboard chart in March, selling 283,000 copies. Photograph: Most Wanted/Rex Features
Born 2000
The spawn of Will and Jada Pinkett-Smith was always going to be Hollywood royalty – just perhaps not before puberty, with a song about whipping her hair.
Sales clout Smith sold 137,000 copies of Whip My Hair in the US. Photograph: Masatoshi Okauchi/Rex Features
