Zac Efron

Long live 'Tiger Beat' and 'Bop' magazine.

It's no surprise Jennifer Aniston's hair — a.k.a. "The Rachel" — made the list.

The rumors began last April.

One student thought Jesse McCartney was Justin Bieber!

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

We love a #Zanessa throwback.

Business in the front, party in the back.

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.

Kelly is joined by Zac Efron, Missy Elliott, Shia LaBeouf and more.