Katy Perry was the featured guest Saturday night in Las Vegas as the Rolling Stones played the fourth stop on their “50 & Counting” arena tour.

Perry joined the band at the MGM Grand for their 1978 track, “Beast Of Burden.”

“I'm much obliged & quite honored!” tweeted the pop star after the Stones announced her appearance on Twitter Saturday afternoon.

When it was over, Perry took to Twitter again to tell fans, “Yes, I just did gyrate on Mick Jagger. WHAT?!”

The Rolling Stones







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will.i.am has dropped his new video.

"T.H.E. (The Hardest Ever)" features will.i.am along with Mick Jagger and Jennifer Lopez.

Lopez joins the Black Eyed Peas singer on the choruses, while Jagger jumps in towards the end of the track.

The futuristic video shows will.i.am doing all kinds of cool, crazy things – from driving a car through a wall to jumping out of a plane and landing on top of a train…all before he heads to outer space.

Will.i.am recently posted some thoughts on the song:

i am prepared for this next journey... its going to take vision... its going to take focus... its going to take patience... its going to take dedication... i.am.committed... i.am.ready i know its not gonna be easy... its going to be difficult... i have meditated... i have sculpted, crafted and designed frequencies to deflect and protect me... and that protection is called... #willpower blessed.i.am to have the force of "T.H.E" (the hardest ever)...

will.i.am

will.i.am - T.H.E. (The Hardest Ever) ft. Mick Jagger & Jennifer Lopez