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Britney Spears is twerking it out!

A sweaty Britney Spears was spotted leaving a dance studio in Los Angeles on Thursday. It looks like Britney is getting ready (along with all of us) for the big announcement about her residency deal in Las Vegas. And we can't wait!

The 31-year-old pop icon was outfitted in a pink tank top and grey sweats and was sipping on some Starbucks. This morning, Good Morning America announced that the "Circus" singer will be performing live on the show on Sept. 17.

And while we're eagerly anticipating her duet with Miley Cyrus on Bangerz, we are even more stoked on her probable Vegas residency at the newly revamped Planet Hollywood.

There are many clues that the Sin City deal is going down: Caesars Entertainment has reportedly invited employees to "come play a part in the biggest announcement in Las Vegas Entertainment History" on September 17, which, oddly enough, is the same date that BritneySpears.com is counting down to for that whole #AllEyesOnMe hoopla AND that's also the day the "Toxic" singer will be appearing on GMA. Coincidence? We think not.

Also, more proof: BreatheHeavy reports that participants in the Vegas event are being told to meet at Planet Hollywood to be shuttled to an undisclosed location and to "expect this event to generate global media attention." If we were detectives -- we think this case would be closed.

In the meantime, we are glad that BritBrit is working it out on the dance floor. But enough of this mystery already --we just wanna know!