Lauren Conrad does it best: beachy, tumbly, subtle and fun.
Charlotte Free: sexy in a slept-in-a-cotton-candy-machine kind of way.
Nicki Minaj channels Barbie full-on.
Dianna Agron's shag is super-cute and the pink streaks are subtle.
Katy Perry's rose-colored roots create a fresh kind of ombre.
Kate Bosworth goes green in a totally new way.