Back in 2000, Justin Timberlake wasn't quite sure what to do with his naturally curly hair, so he gelled it to the point of crunchy definition.

Since then, he's done everything from shaving his head to using a flatiron (allegedly) to keep his mop in check.

Most guys don't have to give their hair that much thought -- but most guys also don't have spiral curls and the spotlight of the world upon them.