Britney Spears Announces Las Vegas Nightclub Performance

'Looks like my little secret isnt a secret anymore,' she tweets before tonight's Rain gig with DJ Pauly D from 'Jersey Shore.'

With less than a week until Femme Fatale hits stores, Britney Spears is adding another date to her promotional calendar. The "Hold It Against Me" singer took to her Twitter on Friday afternoon (March 25) to announce a performance at Rain nightclub at Las Vegas' Palms Casino and Resort scheduled for later this evening.

"Looks like my little secret isnt a secret anymore. Whos coming to watch me take the stage TONIGHT at @RainLasVegas at @PalmsLasVegas?" the pop star tweeted. "You're all invited. Be there or be square bitch!"

Check out hot photos from Britney's Las Vegas show.

Britney is no stranger to the Rain stage. Back in 2003, the pop titan gave fans a sneak peek of her album In the Zone by surprising about 1,800 clubgoers with a 30-minute set, which included songs like "Me Against the Music" and "Breathe on Me."

Spears' Vegas performance is the latest in her string of promotional ventures for her upcoming LP. Last week, it was confirmed that she would pre-tape her "Good Morning America" appearance on Sunday, two days before it will air on the show. On the day of her album release, she will also appear on "Jimmy Kimmel Live!" for a late-night performance of her two latest singles: "Till the World Ends" and "Hold It Against Me."

In addition to her concert specials, MTV will dedicate March 29 to the singer for what is being dubbed a "Britney Takeover" day. The entertainer will also make appearances on "The Ellen DeGeneres Show" and the Kids' Choice Awards on April 2.

Spears has been keeping fans on the edge of their seats for months with video and song teasers leading up to Femme Fatale's Tuesday release. When MTV News interviewed Britney's manager, Larry Rudolph, after the premiere of her "Hold It Against Me" video, he had high praise for the pop star's latest project, comparing the album to a Madonna classic.

"In my opinion, this is her strongest album ever. It's somewhat of a departure from what she's done. It's more mature," Rudolph told us last month. "It's more of a dance record and this really is ... Britney's Ray of Light album."

What are you expecting from Spears' new album? Let us know in the comments below!