There are many reasons to love Justin Timberlake. Aside from his boy band days, his baby blue eyes, and his ability to rock a fedora and not look like a fool, we're particularly smitten with his hair. Specifically, we're fairly obsessed with a particularly curly Afro style that he rocked from the late '90s to the early '00s. But it's clear to us that Justin (and his hair) are getting hotter as he ages. What better way to celebrate Justin's 34th birthday than to take a look back at all his sexy styles? Prepare to swoon! See how Justin's gone from a curlicued cutie to straight and sexy.