Zac Efron

One student thought Jesse McCartney was Justin Bieber!

The 'High School Musical' heartthrob looks a little different, according to these tweets.

Because breaking up is hard to do.

A new Charlize Theron movie, a Zac Efron travel series, and an ‘Unsolved Mysteries’ update are all on the way.

Sorry ladies, he's off the market.

Zac could be the next Captain Jack Sparrow.

Zac was flown to Australia for treatment.

Check out how your favorite celebrities have transformed over the years.

See how your favorite celebrities have transformed since they first made it big.

From photos of exes to caption mishaps, we've rounded up 25 instances celebrities deleted posts from their Instagram feeds.