Last Night's Look: Love It or Leave It?We can't stop talking about the outfits Katy Perry, Jessica Biel and more stars were just spotted in! Check them out, then vote – fashion-forward or fashion fail?

SIENNA MILLER

Marlowe’s momma makes basic black look anything but boring, accessorizing her flower-detailed Topshop LBD with a red-and-black Delvaux bag and pointy throwback pumps at the Tribeca Film Festival in N.Y.C.