The singer stays hot in a revealing lemon gown while celebrating in D.C. Plus: Miley Cyrus, Kristen Stewart, Mariah Carey and more

HELLO, YELLOW!

Rihanna shows some skin in a sexy yellow Jasmine Di Milo mini-dress Tuesday, when the singer stepped out for the Recording Industry Association of America's Inaugural Ball, benefiting Feeding America, in Washington, D.C. At the event, Rihanna performed a medley of her hits, including "Disturbia" and "Rehab."