Katy Perry threw an elaborate 'Grease'-inspired sock hop for her birthday -- and it was amazing!
It just so happens that Greek god Zac Efron, also has a very good looking younger bro
The hottest of Hollywood hunks are painting their nails for a great cause
Simone Biles talks gold medals, paparazzi and breakfast on the beach with Zac Efron
Here are what the 12 biggest heartthrobs from the '80s, '90s, and '00s looked like then and now
Zac Efron's dog dies: See the actor's sweet tribute!
Social Scene: Week of Aug. 21
Simone Biles finally meets Zac Efron at Rio Olympics
Simone Biles has a life-size Zac Efron cutout, and honestly, Zac Efron should be flattered
Zac Efron talks sobriety, losing his mind from social media and why he can't date
OnlyOnAOL: Adam Devine on what it's really like playing Zac Efron's brother
'High School Musical' Gets the 'Bad Lip Reading' Treatment -- With Hilarious Results!
OnlyOnAOL: Aubrey Plaza spills on working with 'disgusting' Zac Efron
Zac Efron in talks to join Hugh Jackman's 'Greatest Showman on Earth'
Remember those short few seconds when Miley Cyrus appeared in 'High School Musical 2'?
Julia Roberts, Chrissy Teigen, Zac Efron and more stars hit Guys Choice Awards
Kelly Ripa's first wave of guest co-hosts: Who had the best and worst TV ratings?
OnlyOnAOL: Seth Rogen praises Zac Efron's perfect pout
Zac Efron reveals what it would take for him to go full frontal in a movie
Rose Byrne poses for 'Playboy' just months after giving birth
Zac Efron and Sami Miro split after nearly 2 years of dating
EXCLUSIVE: Zac Efron goes NSFW dishing on Robert De Niro in 'Dirty Grandpa'
Zac Efron rocks sexy red dress in 'Neighbors 2' teaser: 'Sorry, mom'
The cast of 'Baywatch' then and now is just something you have to see
Dwayne Johnson debuts 'exclusive first look' of the 'Baywatch squad' on Instagram -- See sizzling hot pics from set!
A few poems about how ridiculously ripped Zac Efron is right now
'High School Musical 4' a go, Disney Channel begins casting
Watch the first trailer for Zac Efron's 'Mike and Dave Need Wedding Dates'
Zac Efron shows off insane biceps (and abs) in new candid pic: 'I woke up like this'
Zac Efron gives Ellen DeGeneres a sexy lap dance