Christina Aguilera announced a Las Vegas residency yesterday.  It’ll kick off May 31st at Planet Hollywood.  And since Britney Spears is also doing a residency, what are the chances we’ll see them onstage together?

Christina says, quote, “We’re in Vegas, it’s inevitable.”

She adds, quote, “There’s so much history where I’m going and I just feel like calling up all those girls . . . Lady Gaga is the newest one there.  I wanna get the real scoop from all of them and be like, ‘What’s it really like?'”