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(Extra) - "Extra" can exclusively confirm that Britney Spears' Las Vegas gig is 100% on! 

Britney's manager Larry Rudolph confirmed to "Extra" that the Vegas show will happen at one of two casinos, one of which is part of Caesars Entertainment group.  The deal will be finalized once Britney's team decides which one to go with.  The pop star has been in negotiations to do a residency in Las Vegas the past several months, a formal announcement is expected in the next coming weeks.

Next order of business: getting Britney to tell the dealer to "Hit Me Baby (One More Time.)."