Lady Gaga made a gravity-defying entrance at N.Y.C.’s Carnegie Hall last night, adding her own eccentric spin to fund-raising attire in a custom black lace Calvin Klein dress, granny-chic gray hair and enormous heel-less platforms. The pop star was joined on stage by Elton John, Mary J. Blige and Kate Hudson to raise funds for Sting and Trudie Styler’s Rainforest Foundation, a nonprofit that helps raise awareness for the plight of the amazonian rainforests. For her performance, Gaga changed into an all-white Calvin Klein confection and Jennifer Behr‘s lace tiara. The giant shoes stayed, but she had to remove one of when she hit the piano! Check out the performance (a duet of Journey’s “Don’t Stop Believin’” with Elton John) after the jump!