It's hard to think of life before Katy Perry but back at the start of 2008, such was reality. Things changed that April when Perry released I Kissed A Girl, triggering No. 1s across the world and the start of something massive. A star wasn't just born... it exploded in a shower of glitter, fireworks and candy changing the face of mainstream pop along the way.

In the three albums since, Perry has dominated the charts with singles including California Gurls, Firework and Part Of Me. Recent album PRISM was her second successive No.1 in the UK and US and has shown a new side of the singer, best illustrated by Dark Horse, a dance driven track full of drama.

Katy Perry has provided many memorable moments for Radio 1 listeners over the years, including U CTRL KATY with Scott Mills, surprising Greg James as his special guest and an amazing Live Lounge Special at Maida Vale in 2012, when she covered Paris by Jay-Z and Kanye West.

Big Weekend is certain to be another amazing chapter in this pop icon's career. Glasgow, get ready to roar!