Posted on Mar 24th 2011 @ 7:00 PM

Stars Lighten Up!

Think blonde – but just barely. Rachel Bilson, Mandy Moore and other hot celebs are sporting super-subtle sun-kissed strands. "A foil-free, paint-on hair-color process creates the effect," says celebrity colorist Colleen Conway (who's worked with Moore). And since the dye doesn't touch the roots, this method requires less maintenance, adds NYC hair pro Adrian De Berardinis.