Katy Perry: 'Roar' Live on 'The X Factor UK'!

Katy Perry and her boyfriend John Mayer make their way out of the Shoreditch House separately after enjoying a night out together on Sunday (October 20) in London, England.

That same day, the 28-year-old singer made an appearance on The X Factor UK to perform her hit single “Roar” while John, 36, was performing at the O2 Arena as part of his Born and Raised Tour – Check out her performance below!

PHOTOS: Check out the latest pics of Katy Perry

Make sure to listen to the full stream of Katy‘s new album Prism and pick it up in stores or when it hits iTunes on Tuesday (October 22).

10+ pictures inside of Katy Perry and John Mayer leaving the Shoreditch House…