The 28-year-old singer helped the guys – Mick Jagger, Keith Richards, Charlie Watts, and Ronnie Wood – out on the song “Beast of Burden” during the show. Check out concert footage below!
The next night, Katy was spotted leaving the Chateau Marmont with a gal pal.
FYI: Katy is wearing a vintage leather bustier, a Mary Katrantzou skirt, and Giuseppe Zanotti thigh high boots.
The Rolling Stones & Katy Perry – Beast Of Burden