Britney can't even perform live at the Billboard Music Awards she has to precord the performance several times days in advance, but the Army thinks she has a chance of doing the Super Bowl from a forehead that's probably not even her
Beyoncé was FORCED to sing live after the Obama inauguration fiasco. she definitely would have lipsynched like everyone else.
I mean, she was probably forced by the public to sing live, but the NFL likely didn't give a damn if she live or not. She lipped the rehearsals to preserve ha vocals though.