Last Night's Look: Love it or Leave it?Check out the head-turning outfits Jennifer Lopez, Nicole Richie and more stars were just spotted in! Then decide – fabulous or fashion fail?

NAOMI WATTS

Counting herself among Stella McCartney's legion of famous fans, the actress wears head-to-toe McCartney, including an embroidered dress with an exaggerated sleeve, to attend the NSPCC Pop Art Ball with the designer in London.