Katy Perry tweeted a photo of herself with Mick Jagger after she sang with the rock icon during a Rolling Stones concert in Las Vegas.

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Perry performed "Beast of Burden" with Jagger and his band-mates during Saturday night's show.

"Yes, I just did gyrated on Mick Jagger. WHAT?! #Stones50," she said via Twitter after the appearance.

"Mick & Kate forever!" she wrote Sunday. "Thanks for letting me be the 5th wheel last night! @Rollingstones"

Perry also posted an image of herself with Jagger and his longtime collaborators -- Keith Richards, Charlie Watts and Ronnie Wood -- taken after the show.