Is Courteney Cox a Backstabber?

With friends like Courteney Cox, who needs enemies?

Cox, who is supposedly best pals with her former "Friends" co-star Jennifer Aniston, was spotted chatting with Aniston's ex-husband Brad Pitt at a concert Sunday night.

Cox was at the Wiltern Theater in LA with husband David Arquette for the final stop on rocker Chris Cornell's Scream album tour when Pitt showed up.

Our backstage spy told us, "Instead of ignoring him, Courteney chatted away with Brad all night. The three were in great spirits and seemed really happy to see each other."

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