With just one day (actually, technically less than 24 hours) to go until the 3 AM EST premiere of her "Slumber Party" music video with Tinashe, the Legendary Miss Britney Spears brought her candy lotion, pillows and potions-filled Glory banger to life for the very first time live on the stage of Piece Of Me in Las Vegas last night (Nov. 16).

Dressed in some very The Intimate Britney Spears-looking silk robes (perhaps from the Ambrosia collection?) and the now-requisite choker, the In The Zone icon and her troupe of dancers strutted, shimmied and hair-flipped their way through B-Girl's brand new single, complete with copious amounts of floorwork — like sheets all on the floor just like an ocean.

It's further evidence that each night of Piece Of Me is anything but predictable: like her impromptu spoken word rendition of Meredith Brooks' "Bitch," you just never know when Brit'll switch it up on stage next.

Check out the first footage of "Slumber Party" in action below. Go f--kin' crazy and watch as many times as you'd like: make it double, triple, oh...

Britney Kicks Off Remixed, Reimagined and Still Iconic Piece of Me Residency: