Dlisted — If you’re one of Katy Perry’s 89.1 million Twitter followers (yes, that number is correct), you no doubt saw her tweeting some truly insane shit yesterday. The most insane being a tweet sent to her forever enemy Taylor Swift that wasn’t simply ... more info

Starpulse — Katy Perry has more Twitter followers than anyone else in the world. And all 89 million of them received some unauthorized commentary after the pop star's account was hacked on Memorial Day. more info

Idolator — The hacker also tried to leak a supposed new Katy Perry song. more info

People.com — Katy Perry is the most-followed person on Twitter, with 89 million followers more info

USA Today Music — The hacker also leaked an alleged new Katy Perry song.             more info

MSN Music — The 31-year-old singer's Twitter account was the victim of a hacker over the Memorial Day weekend. more info

NME — ‘Witness’ is supposedly by Perry, according to Romanian hacker. more info

Time — #HackersGonnaHack more info

MTV.co.uk News — Katy Perry is hacked on Twitter with a tweet saying 'miss you', presumably referencing her rumoured falling out with fellow popstar Taylor Swift, all as new music from Katy - a song called Witness... more info

Jam! Showbiz Music, Canada — Katy Perry has fallen victim to an Internet hacker, who took over her Twitter page and leaked an unreleased song. more info