Start getting excited! VH1 Divas: Salute to the Troops rehearsals are well underway and Katy Perry is practicing hard.
VHI1 Diva: Salute to the Troops airs Sunday, Dec. 5 at 9 p.m. and is hosted by Kathy Griffin.
Katy Tweeted a picture in costume with the "Queen of Comedy."
But Katy has been hard at work rehearsing with Keri Hilson and Jennifer Nettles and you can catch a clip of them singing along to "Boogie Woogie Bugle Boy" below!