Katy Perry sang with Mick Jagger at the Rolling Stones concert in Las Vegas on Saturday.
The 28-year-old singer joined the band on stage for their "50 and Counting" tour and belted out "Beast of Burden" with Jagger, and she seemed pretty pumped about the experience.
After the show, Perry tweeted, "Yes, I just did gyrated on Mick Jagger. WHAT?! #Stones50," and posted a photo of herself with the band:
— Katy Perry (@katyperry) May 13, 2013