From InStyle.com – This summer, as “Grease” returns to theaters in sing-a-long form (it’s being billed as “the original high school musical”), and the surprisingly unstoppable “Step Up” series releases its third installment (in 3-D, no less), it’s clear: Films that feature dance are bigger than ever.
Accordingly, we’ve compiled a list of some of the best dance scenes ever shown on-screen.
Grease: Pollyanna-ish Sandy needn’t have bothered with her bad-girl makeover: She’d already won Danny’s heart. But we love the way Olivia Newton-John and John Travolta’s tight, black, “greaser” duds contrast with their super-sunny singing and dancing in this 1978 musical’s fun finale.

Click here for the full list