Katy Perry joined The Rolling Stones on stage this weekend in Las Vegas to perform a cover of their classic hit, "Beast Of Burden." Perry gyrated on Jagger and proudly tweeted about it on twitter.

'Yes, I just did gyrated on Mick Jagger. WHAT?! #Stones50.'

She then posted a snapshot of herself on stage, with the caption: "Mick & Kate forever!"

Katy has become the latest celebrity guest to join the legendary rockers on stage, providing vocals on the track at the MGM Grand Garden Arena on Saturday.

Perry jammed out at MGM Grand Garden Arena in Las Vegas looking sexy in a black leather corset, matching thigh-high boots and a coordinating skirt.

The pop star sang Beast of Burden from the group's "Some Girls" album and was thrilled to be in the presence of Keith Richards, Charlie Watts, Ronnie Wood and singer Mick Jagger.

The guest spot came as little surprise over the weekend, as The Stones took to twitter to announce the news before the show. Perry herself replied to say she was "Much obliged and quite honored."

Katy followed the acts of Lady Gaga, Florence Welch and ex-beau John Mayer who sang with The Rolling Stones as part of their 50 & Counting Tour. The band were also joined by a local school choir for the Las Vegas show, who performed "You Cant Always Get What You Want" with the group as part of the encore.

Tom Waits and Gwen Stefani are expected to joint the legendary band on stage in upcoming shows.