'NSYNC, Backstreet Boys Unite For Benefit Concert

Ricky Martin, Bon Jovi, Santana also confirmed for event to aid attack victims.

'NSYNC and Backstreet Boys are among the tops in pop who are joining forces for an all-star benefit concert to aid victims of the terrorist attacks of September 11.

Those groups, along with Michael Jackson, Mick Jagger, Aerosmith, Aaron Carter, Ricky Martin, James Brown, Al Green and Kiss are confirmed to perform at United We Stand, as the show is titled, taking place October 21 at Washington, D.C.'s RFK Stadium, according to a spokesperson for promoters Clear Channel Entertainment. Goo Goo Dolls and Carlos Santana may also perform, according to a source close to the event.

"We wanted to definitely get involved," 'NSYNC's Joey Fatone told MTV News on Sunday. "We're going to do something so we can help them out."

"It's amazing," his bandmate Lance Bass added. "We have everyone from Aerosmith to Matchbox Twenty, us, Britney [Spears], Bruce Springsteen — so many people are coming out and really supporting this thing, ... and Michael Jackson will be there. It'll be big."

The group is reaching out to Springsteen, Spears and Matchbox Twenty, though those acts have yet to be confirmed. Other artists are expected to appear, and additional performers will be announced shortly.

Proceeds from ticket sales will aid the American Red Cross Relief Fund, the Pentagon Relief Fund and the Salvation Army Relief Fund.

Tickets for United We Stand go on sale Friday.

For more information on and audience reaction to the attacks, including tips on how you can help, see "9.11.01: Moving Forward".