Fashion Week Spring 2009

Mariah Carey took it back to the '70s when she performed her new disco-themed song "That Chick," in a glitzy Pamella Roland crystal and sequin tulle evening gown. Earlier in the evening, the songbird joined Beyonce, Mary J. Blige, Rihanna, Fergie, Miley Cyrus, Ashanti, Natasha Bedingfield, Keyshia Cole, Ciara, and Leona Lewis on stage for an ensemble performance of "Just Stand Up," a song created for the "Stand Up to Cancer" initiative, which the night's event benefited.