Last Night's Look: Hit or Miss?

Check out the head-turning outfits Ashlee Simpson, Rihanna and more stars were just spotted in! Then decide – fabulous or fashion fail?

JENNIFER LOPEZ

The American Idol judge attends a Hollywood taping in style, wearing a cutout long-sleeve top and pleated shorts (both by Stella & jamie) plus killer heels and Jacqueline Nerguizian jewels.