Last Night's Look: Love It or Leave It?We can't stop talking about Rose Byrne's printed sheath, the Duchess's tartan coat dress and more outfits that stars were just spotted in. Check them out, then vote – fashion-forward or fashion fail?

ARIANA GRANDE

Vote on the singer's sweet lavender floral-print dress and white pumps, worn to the Y100 Jingle Ball in Miami, but afterwards, can we please talk about how she always wears her hair like that? (Seriously, always.)