I'm agree with Elspode on this. I'm NOT a fan of Britney's, although some of her music is catchy. But if she's lip-syncing, dancing and trying to keep her choreography in sync with the song being played, she will probably need to sing the song softly to herself.
Combine not really trying with running, jumping, contorting one's body about and I'd bet the best singers there are would sound like crap.
Ok, I would.
