Katy Perry believes her upcoming world tour will be different than anything she has done in the past.

The singer is due to open her Prismatic tour in the UK from May next year as she continues to promote her new album 'Prism'.

Speaking to Capital FM, the pop songstress revealed that her audience will also be an integral part of the live show, saying:

"The Prismatic world is what I'll be offering you, my world that is very Prismatic! I love that I'm kicking it off here in the UK, so much so, because I've never done that and it raises the bar for me. I'm just really excited. I just did a big tour meeting yesterday and saw the graphic drawing of the stage and it's unlike anything I've seen for any other artist and it's unlike anything I've ever done. It's different, it's fresh, it's clean and it's actually in the middle of the audience it feels like."

The 'Roar' star added: "I get to be close with them at all times. I'm going to bring all the bells and whistles like it was last time, but it won't be so highly narrated. I just want a little bit more room to express myself."