Listening to it now.

And she was lip synching. Notice they stay away from showing her mouth up close untill the last few seconds at the end.

Its bad but not as bad as Roseanne's version.

http://www.youtube.com/watch?v=DrFW2aYHVR8

I don't know if anyone on Earth could do a worse one than Roseanne. Maybe Joan Rivers or Fran Drescher?