"Grease" is still the word, but at long last, the kids from Rydell High aren't the only ones singing it - that's where you come in. Even if you're not sure how, your brain probably already knows the words to classic songs like "Summer Nights" and "You're the One That I Want." But just in case you're not sure when to "ooo" and when to "whoa," this sing-a-long version of the original high school musical features every last lyric happily dancing for you across the screen right alongside John Travolta and Olivia Newton-John.