Britney and Tinashe are having a "Slumber Party" at the Jingle Ball.
On Friday night, Britney will take the stage at the Staples Center in L.A. to perform a few of her biggest hits and several cuts off her recent LP Glory, which will include a number alongside her "Slumber Party" co-star Tinashe.
The pop princess shared a behind-the-scenes photo of the two rehearsing with Brit's backup dancers ahead of showtime.
"Jingle ball here we come," she wrote.
She also posted this, but made no mention today (Dec. 2) is her 35th birthday.
And PS - Diplo reveals he's DJing Britney's birthday party tonight following her set.
im Djing @britneyspears birthday party tonight at the staples center
— diplo (@diplo) December 2, 2016