It looks like the photographer caught this little guy off guard with this picture! Although this singing, guitar-strumming celebrity once had longer locks, his face is still distinguishable.

Back when he was just a kid living in Fairfield, Conn. -- when he hadn't even stepped foot in high school, yet alone ran around the halls of it -- he was first inspired to pick up a guitar after watching Marty McFly's epic 'Johnny B. Goode' solo in 'Back to the Future.' Nowadays, when he isn't snuggling with his pop star girlfriend, he keeps busy churning out mellow pop-rock hits that are sure to make your 'Daughters' swoon.

Can you guess whose yearbook photo this is? Click through to see if you were right.