by Claudine Zap It may have been some time since you crooned along to every last lyric of the " Grease " soundtrack. But that questionable skill set will finally have a home in this summer's re-release of the movie-musical, where you'll be  encouraged to sing during the show. Here's a peek: As you can see from the trailer, even if you don't know the lyrics, it's not a problem, because they appear, Karaoke-style, at the bottom of the screen during each song,