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?

  • DEMI LOVATO photo | Demi Lovato

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Updated: Thursday Dec 26, 2013 | 09:30 AM EST

DEMI LOVATO

Her hair may be all different shades of blue, but when it comes to her outfit, Demi sticks to all black: high-shine leggings, a cardi with a quilted leather panel, plus loads of jewelry, at the Y100 Jingle Ball in Miami.