Watch Grease Sing-a-long here:
http://movies.ovemedia.com/grease-sing-a-long-hd-online/

Plot:
Good girl Sandy and greaser Danny fell in love over the summer. But when they unexpectedly discover they're now in the same high school, will they be able to rekindle their romance?

Stockard Channing ... Betty Rizzo
Jeff Conaway ... Kenickie
Barry Pearl ... Doody