Katy Perry and Mick Jagger performing "Beast Of Burden" in Las Vegas.
Photo: @KatyPerry's Twitpic
Katy Perry has played all of the biggest stages in the world, has performed for the President, and a whole host of other things that would make us quake in our boots with terror, but we'd be willing to wager that she still gets a touch butterflies before a REALLY big show. OK so maybe she has her game face down pat (there wasn't a hint of stage fright in her pre-show ritual as shown in her Part Of Me doc), but singing a duet with the Rolling Stones? If Katy didn't get a little nervous, she might just be a robot. The singer joined Mick and Keith on stage at their Las Vegas tour stop, and brought that rock star somethin' somethin' in an all-leather bustier and mini skirt combo. Holding her own singing the Stones' classic "Beast Of Burden," Katy's down-to-there sweetheart neckline bustier, with thick ties up the front, and a bright print on the skirt, was classic KP, with a definite old school rock twist.

