Katy Perry announces huge 'Witness' UK arena tour.

Katy Perry has announced a huge UK arena tour, but fans will have to wait A YEAR to see her.

Katy Perry's Witness tour goes on sale next Friday.

Katy Perry's Witness tour goes on sale next Friday.

Katy will be in the UK next June, kicking off with a huge gig at London's O2 Arena.

14 London The O2 Arena

18 Birmingham Barclaycard Arena

19 Sheffield Arena

21 Liverpool Echo Arena

22 Manchester Arena

24 Glasgow The SSE Hydro

25 Newcastle Metro Radio Arena

The 'Firework' singer is currently in the UK for this weekend's Manchester One Love concert and Glastonbury festival.

Tickets for all the UK tour dates go on sale on Friday June 9 at 09.00 and are available here.