not true. i looked it up before i posted the comment...
the music is all done beforehand because they dont' have enough time to do it right.
but Bruce and when McCartney did it, they weren't entirely lip synched.
as far as half time performances go, which is what Beyonce will be doing.
all good, i could care either way. i just hate how everyone kept saying it was memorable and beautiful and amazing.. .and it wasn't even real. haha.