The foundation is the sole sponsor of the Perry v. Schwarzenegger case, which is the federal constitution challenge against Proposition 8, which ended gay marriage in California two years ago.
The foundation's Board president Chad Griffin is "deeply honored to have the support of Sir Elton John. The American Foundation for Equal Rights stands for the enduring principle that all Americans are created equal, and believes that ending state-sanctioned discrimination is a critical step we must take toward ending the hate crimes and suicides that continue to claim the lives of young Americans."
All proceeds from the event will support the American Foundation for Equal Rights.
Sir Elton John's performance comes after another fundraising event for the foundation in New York. An art auction raised $600,000, and was supported by Barbara Bush, Mayor Michael Bloomberg and Google Chairman Eric Schmidt. Work from Diane Arbus, Roy Lichtenstein and Andy Warhol were featured in the auction.
The performance will be at the Green Acres estate of Ron Burkle. For tickets and information, email email@example.com.