17.
The swoopy banged-Bieber.
15.
This one is more about the outfit than the hair. Like...?
14.
The faux wind-swept poof w/ bonus chin strap.
13.
The bucket hat surprise.
12.
The time he got a perm.
11.
The mulleted newsboy.
10.
The long-haired lion lover.
It's also known as "The Lion King" because it is inspired by a lion.
7.
The straight-haired blowout accented by highlights.
(This is the face of a dude with a mullet.)
2.
The same as above but he added sunglasses in an attempt to distract. It didn't work.