1.
Christina Aguilera's crimps.
2.
Hilary Duff's chopsticks.
4.
Gabrielle Union's dramatic flip-out.
5.
Kelly Clarkson's chunk-tastic highlights.
6.
Mischa Barton's enviable beachy waves.
7.
Ashlee Simpson's piece-y bangs.
8.
Avril's pin-straight locks.
10.
Kelly Rowland's funky red highlights.
11.
Nicole Richie's spindly extensions.
12.
Keira Knightley's pixie cut.
13.
The Olsen twins' curls.
14.
Kelly Osbourne's goth tease.
15.
Fergie's possible Bump It.
16.
Mariah Carey's butterfly clips.
17.
And finally, Victoria Beckham's asymmetrical bob.