MTV.co.uk News — Singer tweets the cover of her upcoming single to fans. more info

MTV.com News — Could it get any sassier? By Emilee Lindner more info

ContactMusic — Katy Perry is having hypnotherapy to get over John Mayer.The 'Roar' hitmaker was devastated when her two-year romance to the singer ended in February... more info

Stereogum — Now on his third in a series of articles examining the brilliant music theory behind ubiquitous pop hits, Owen Pallett might just have a brilliant recurring column in the works. Alas, Pallett says this latest installment will be his last. Beginning w... more info

ContactMusic — Katy Perry is planning to become an art collector.The 'Teenage Dream' singer has decided to add another string to her bow by investing in fine art... more info

ContactMusic — Katy Perry and Pharrell Williams were among the stars who helped raise $2.4 Million (£1.5 million) at the Museum of Contemporary Art's 35th... more info

ContactMusic — Katy Perry wants ''slime green'' coloured hair.The 'Roar' singer - who is known for her jet black locks, but has also dyed it pink, electric blue,... more info

Stereogum — As we recently reported, Owen Pallett took up the challenge of analyzing a pop song using music theory. It was Katy Perry’s “Teenage Dream,” and it was a great read, but perhaps the best part of that article was when he ended with a tease about... more info

ContactMusic — Katy Perry went on a date with rapper Riff Raff.The 'Roar' singer seems to be putting her split with John Mayer firmly behind her since she was... more info

TMZ — Katy Perry's rebound after John Mayer -- Riff Raff?!!? Strange as it sounds ... we got the rapper talking all about his night with Katy -- but who brags about hooking up with one chick WHILE there's a different chick grinding on your crotch? Riff… ... more info