Momsen stays rosy in a bright skirt – and matching lips – at a bash in N.Y.C. Plus: Maks & Karina, Christina Aguilera, Johnny Depp, Mariah Carey and more

SHOP AROUND

Hilary Duff, who's been hard at work filming a guest spot on Law & Order: SVU, takes a break Tuesday for a shopping trip to Barneys New York in the Big Apple.