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Justin Timberlake is enlisting famous friends -- including former tour-mate Christina Aguilera -- for a charity concert benefiting Shriners Hospitals for Children.

Joining JT and Xtina on the stage will be P. Diddy and his Dirty Money crew, Selena Gomez & the Scene, T-Pain, Lady Antebellum, Salt-N-Pepa and a band signed to JT's Tennman Records label, FreeSol.

The concert, which takes place October 23rd at the Planet Hollywood in Las Vegas. If you can get yourself to Vegas this fall, be prepared to pay: tickets are going for anywhere from $100 to $350.

But at least it goes to a good cause!