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

DIANNA AGRON

Joining Diane at the N.Y.C. Louis Vuitton bash, the Glee star also opts for purple, wearing a psychedelic-print Louis Vuitton dress in a regal hue, plus ankle-strap wedges and sexy smoky eyes.