13. Matthew Lewis

There's a reason it's called “Neville Longbottoming” when a goofy kid magically grows up to be hot.
14. Justin Timberlake
15. Victoria Beckham
Proof that you can rock a side ponytail and still one day become an internationally-renowned pop star, fashion designer, and wife to the hottest man to ever kick a soccer ball. Girl power to ya, Victoria Beckham!