Last Night's Look: Hit or Miss?

Vote on this week's styles including Miley Cyrus, Jessica Simpson and more stars! You decide – are they fashionistas or flops?

CHRISTINA AGUILERA

Hot mama alert! Leaving her adorable son Max at home, the sexy singer rings in the New Year in a sparkly black chiffon tiered beaded Moschino dress topped off with a giant diamond necklace, her signature red lips and cap-toe Christian Louboutin pumps while hosting TAO's New Year's Eve party in Las Vegas.