Britney Spears Confirms 'Surprise' Las Vegas Concert

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"Looks like my little secret isn't a secret anymore," she Tweets of her performance, which will appear in an MTV special.

Talk about the worst kept secret.

Britney Spears has confirmed she'll perform a "surprise" concert in Las Vegas Friday night at the Palms Casino Resort Rain Nightclub. It will be filmed for an upcoming MTV special.

"Looks like my little secret isnt a secret anymore. Whos coming to watch me take the stage TONIGHT at @RainLasVegas at @PalmsLasVegas? -Brit" she posted on Twitter Friday.

She added shortly after, "You're all invited.  Be there or be square bitch! -Britney"

Her manager Tweeted #BritneySpearsPalms, which briefly became a Twitter trending topic.
reports she'll hit the stage twice: once at 8 p.m. Friday in a ticketed event, and again at midnight for a performance that will be open to the public. The Jersey Shore's Pauly D will DJ.

Her seventh studio album, Femme Fatale, drops Tuesday.