Katy Perry understood the assignment ... When she appeared on stage, Perry appeared in a simple dress, but once she pulled a ribbon at the back, she spun out the gorgeous blue gown.

Katy Perry is addressing the hate fans have expressed for a new look she debuted on social media and American Idol - making it clear that they don't have to worry about it. Perry is on her way out ...

Katy Perry is ... shined so brightly back here on earth. It's just us that are left with a dimmer world without you." View this post on Instagram A post shared by KATY PERRY (@katyperry) Perry ...

Katy Perry pulled out ... She styled her hair down in a wet grunge look. At one point, the Grammy winner turned around to display a QR code tattoo on her lower back, which, when followed, prompts ...