Can You Guess the Celebrity in This Yearbook Photo?

This freckle-faced, future boy bander is just too precious. Do you recognize him at all?

Although he was born a brunette, this lil Irish lad began bleaching his hair blond at the young age of 12. Here, you can see him with his au natural color, however. His baby blues are even more piercing when he has dark hair!

Nowadays, you can catch this dancin' fool onstage with his four musical friends, singing international hits and making millions of girls scream almost to the point of spontaneous combustion. He can't help that he's so cute and talented!

Have you figured out who this crooner is? Click through to find out!