Who was the best dressed pop songstress at Billboard Music Awards?

Diva's pose it up at BBMA's red carpet...
Minus the cut-out and Rita Ora's dress would have been right up my street.

Britney's dress was like a fuller variation of Mariah Carey's performance outfit, but it did nothing for her shape whatsoever. Mariah Carey's Tom Ford mini dress is too short, while J.Lo's style of sheer dress is becoming too predictable. If I'm totally honest, I feel she's way too old to be trying to pull it off. Not saying to dress frumpy, but you can still look sexy and age appropriate at the same time.