Mama Jonas Blue feat. William Singe
The 'Roar' singer has just announced a world tour for 2014 including a number of arena shows here in the UK. Katy has already confirmed the tour will feature brand new music from 'Prism', some old favourites and has told fans "It will be a feast for your eyes". Find out exactly what to expect from Katy Perry's 'Prismatic World Tour' tour right here!
We've had spinning bras, candy bikinis and much more more.
"California Gurls, they're unforgettable..."
(Picture by: Ian West/PA Wire/Press Association Images)