Halt the presses — Kate Moss is smiling, wide! The model spent an evening celebrating the opening of a new London art exhibition, and though she was dressed in all black, her sense of humor was anything but morose. Kate generally wears a dark palette, but we rarely see her in head-to-toe black. The patent-leather coat adds a much-needed shine and the pointy black lace-up boots give her a witchy vibe. Wicked!