Amy Sussman/Getty Images for The Griffin NEW YORK – JULY 28: Singers Katy Perry (L) and Rihanna (R), with Sugar Factory Couture Lollipop, attend a post concert party at The Griffin on July 28, 20 …

Amy Sussman/Getty Images for The GriffinSingers Katy Perry (L) and Rihanna, with Sugar Factory Couture Lollipop, attend a post concert party at The Griffin on July 28, 2009 in New York City. (Amy Sussman/Getty Images for The Griffin)