Last Night's Look: Hit or Miss?

Vote on this week's styles including Diane, Vanessa, Katie and more stars! You decide – are they fashionistas or flops?

COBIE SMULDERS

The How I Met Your Mother star looks polished and pretty in her Ann Taylor striped tee and wide-lapel camel peacoat, which she wears with skinny dark denim and stacked pumps at The Late Show With David Letterman in N.Y.C.