Katy Perry threw an elaborate 'Grease'-inspired sock hop for her birthday -- and it was amazing!
Watch Olivia Newton-John shade 'Grease 2' and praise 'Grease Live'
Olivia Newton-John hilariously reacts to THAT infamous 'Grease' fan theory!
Olivia Newton-John on reports that her long-missing boyfriend faked his death: 'Nobody knows what really happened'
Sarah Michelle Gellar shares insane 'Grease' fan theory -- see what she said!
How 'Grease Live!' kickstarted Jordan Fisher's R&B music career
'The Big Bang Theory' cast performs 'Grease' numbers and Kaley Cuoco strips down!
Vanessa Hudgens delivers spectacular 'Grease: Live!' performance despite the loss of father hours earlier
Vanessa Hudgens' father Greg dies of cancer; Actress still plans to perform in 'Grease: Live!'
OnlyOnAOL: 'Grease' is the word for Hough, Hudgens, Tveit, PenaVega
EXCLUSIVE: Julianne Hough talks snapping sexy pics in 'Grease: Live' costume to send to fiance Brooks Laich
Why Julianne Hough says she's the 'worst bride ever'
Carly Rae Jepsen's 'Last Christmas' cover is here to get you into the holiday spirit
Remember Taylor Hicks? You may be surprised what this 'American Idol' is up to now
AM Daily Buzz: Kendall Jenner makes a major change, Caitlyn Jenner's manslaughter charges and more!
Restaurant City celebrates the 50s with Elvis, Buddy Holly, Grease, and Dr Pepper