Ever since "Dog Days Are Over" owned the charts in 2010, Welch has reigned as fashion's favorite chanteuse. She's been front row at Givenchy, Valentino, and Chanel. At this point, she's old pals with Karl Lagerfeldwho asked the 25-year-old to close Chanel's spring 2012 show by singing in a giant oyster shell. "I ended up scrapbooking with Karl!" she laughs, recalling a later photoshoot with Lagerfeld. "We were discussing Art Deco painters, and suddenly he started ripping things out of books in his library and sticking things together with Pritt Stick glue."
Jacket, price upon request, Balmain; top, $835, Roberto Cavalli; headpiece, $2,000, Pebble London; necklace, $450, Melamed; pearl ring, $210, Ranjana Khan; gold ring, $300, Stephen Dweck Jewelry.