Katy Perry Reveals First 'Prismatic World Tour' Dates!

Katy Perry has officially announced the first set of dates for her upcoming Prismatic World Tour!

The 28-year-old singer will start the tour in May 2014 with a bunch of dates in the United Kingdom featuring special guests Icona Pop.

“I’m bringing my friends @iconapop to Belfast, Newcastle, Nottingham, Birmingham, Glasgow, Manchester, Liverpool, Sheffield and LONDON!” Katy tweeted. “DON’T WORRY – more GLOBAL tour dates coming soon! I can’t wait to get closer to ALL of you than ever before! #THEPRISMATICWORLDTOUR.”

The first set of tickets go on sale this Friday, November 22 at Ticketmaster.co.uk.

Also pictured inside: Katy lounging on the balcony of her hotel room in a bikini top on Monday morning (November 18) in Miami, Fla.