Katy Perry could really hear her fans 'Roar' last night ... probably screaming out in horrible pain -- 'cause one of them ...

Concert ticket prices can be exorbitant these days. Last fall, some fans spent well over $1,000 to see Taylor Swift in Toronto. Later this year, Katy Perry will be coming to Canada with stops in ...

Katy Perry is leaving American Idol in good hands. After the "Dark Horse" singer announced that season 22 of the singing ...