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

CHRISTINA AGUILERA

Christina's healthier lifestyle is continuing to pay off. The singer looks svelte in a Victoria Beckham cut-out black gown which she amps up with her signature fire-engine red lips and nails, and Lorraine Schwartz jewels, also at the TIME 100 Gala.



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