Britney Spears -- Extending Run in Las Vegas

Britney Spears and Sin City are a match made in heaven ... TMZ has confirmed Brit is close to extending her run with Caesars for another two years.

Spears would continue her reign at Planet Hollywood’s Axis theater until Christmas 2016 if she accepts the new deal. The contract would be for two years and pay her $12 million, says the New York Daily News.

Caesars Palace President Gary Selesner told the paper that Brit has been "a great success" during her time in Vegas, adding, "She has been filling out the place every night, and she is enjoying it and is in good health."