Kat, that YouTube clip is the very scene in the movie I was talking about. The technical quality of a YouTube clip is markedly inferior to the original film (even as seen in video form via satelite/cable/DVD), and synchronization of audio to video is usually less than perfect.

At any rate, that's not Marvin Gaye's voice we're hearing, or anyone else's. It's Jack's. Now, it may well be that he dubbed in a vocal track post-production, maybe even with an edit or two, but if he's lip-synching, he's lip-synching himself.

Please consider Little Hawk's opnion and mine ~ we've both allowed that our initial impresisons of the guy were absolutely negative. probably very similar to your own, but that eventually we were both won over.

"YMMV," of course. Maybe you'll never warm up to they guy, and if so, so what. But do yourself a favor and rent School of Rock, anyway. Even if you don't come around to enjoying JB's performance, I defy you not to love the kids in that movie.