Last Night's Look: Hit or Miss?

Vote on this week's styles including Reese Witherspoon, Demi Moore and more stars! You decide – are they fashionistas or flops?

JENNIFER LOPEZ

After helping Kim Kardashian celebrate her 29th birthday – and debuting her own new single –, the superstar is back to cheering on the Miami Dolphins, with husband Marc Anthony, in a black pleated A.L.C. halter dress, bow-topped platform sandals and gold hoop earrings.