PopSugar UK — It's been quite a week for Taylor Swift. After a bunch of drama involving her former flame Calvin Harris, the pop star's old nemesis stepped into the ring. On Wednesday, Katy Perry tweeted the following GIF of Hillary Clinton - who, as you might rec... more info

MTV.co.uk News — Katy Perry also got involved in her own special way... more info

NME — The 'Firework' singer seemed to be mentioned in Harris's tweets about his ex-girlfriend more info

The Mirror — Calvin and Katy's fans have teamed up to send Taylor a message on social media more info

Detroit Free Press — Yeah, this former relationship is going down in flames.             more info

PopSugar — Of all of Taylor Swift's friendships, feuds, and flames, perhaps the most infamous is her seemingly ongoing rift with Katy Perry. And the juiciest part is that neither of them has ever mentioned each other by name. While Taylor and Katy's friendship ... more info

The Daily Mail — Calvin Harris has slammed his ex-girlfriend Taylor Swift in a series of tweets after she confirmed she wrote his song This Is What You Came For. more info

ET Online — If bad blood is what you came for, Katy Perry has entered the conversation with a roar. more info

PopSugar — As of June 2016, Katy Perry is the most followed person on Twitter, and for good reason. The 31-year-old "Roar" singer's tendency to tweet out relatable gems about her day-to-day life - whether it's lint rolling glitter off of her face or examining h... more info

The Mirror — Fans were eagerly anticipating the Firework singer's response to Calvin's stinging tweets - and they weren't disappointed more info