'Dark Horse' songstress Katy Perry has revealed the list of songs she will be playing on each night of her brand new Prismatic tour, which kicks off tonight in Belfast. 

She uploaded a snapshot of the tour's setlist to her official Instagram page earlier this evening (May 7) and accompanied it with the caption: "DON'T BE LATE! #ThePrismaticWorldTour."

The hits she will be performing at the run of concerts include 'Firework', 'Part Of Me', Roar', 'I Kissed A Girl', 'E.T.', and 'Wide Awake'. Also included on the setlist is a 'megamix dance party' and her well-loved single, 'California Girls'. 

Last night, Perry shared a cute poem with her Twitter followers and explained to them that she can't wait for the shows to begin: "

"Twas the night before #ThePrismaticWorldTour when all through Belfast, not a creature was stirring not even one Katycat. The outfits were... Laid out, all sequins in place, the wigs were all set...ready to kick ball change! NOW GO TO SLEEP (I'm yelling at the both of us)."

Watch her music video for 'Birthday' below: