A self-described "singer-songwriter masquerading as a pop star," Katy Perry amassed an impressive string of hits with candy-coated pop confections and her candy-colored, ever-changing style.

Katy and Grimmy chat about British food ahead of her visit to Hull for Big Weekend. ICYMI, Katy Perry is BACK - and she's headlining Radio 1's Big Weekend in Hull! It has been four long years ...

So, why did Katy Perry leave American Idol? Here’s everything to know about the pop singer’s decision to leave the competition series and what she’s been up to since.