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Britney Spears has confirmed rumors of a secret performance she's giving tonight in Las Vegas.
The pop star is set to take the stage at Palms Casino Resort's Rain Nightclub for two performances -- a ticketed event at 8 p.m. and a midnight show that will be open to the public, People.com reports.
Spears took to her Twitter page to reveal the performances and invite fans: "Looks like my little secret isnt a secret anymore. Whos coming to watch me take the stage TONIGHT at @RainLasVegas at @PalmsLasVegas? -Brit" She entices fans even further in yet another tweet: "You're all invited. Be there or be square bitch!"
Her Sin City engagement comes just days before the release of Spears' new album "Femme Fatale," which debuts next Tuesday.