Lady Gaga Rocks For the Fund

She's not Christina Aguilera, but she has risen from little-known dance act to one of today's major international music superstars. Such is the life of Lady Gaga.

There's no disputing her sales. But how do you know she's really made it? Because she was invited to perform at Sting's annual Rainforest Fund benefit show.

On Thursday night, Gaga was on-hand for the star-studded show at New York's Carnegie Hall, which also featured performances by a roster of music greats.

Elton John, host Sting, Bruce Springsteen, Mary J. Blige, Blondie's Debbie Harry and many others were there - the first two performing with Lady G herself.

Gaga and Elton: Don't Stop Believin'

She has her detractors, but Gaga brings her A-game to every concert. Follow the jump for a second video of the rumored hermaphrodite rocking with Sting.