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

Rolling Stone — Taylor Swift's fans were right. The pop star was the infamous "Nils Sjoberg" named in the writing credits for Calvin Harris' Rihanna collaboration "This Is What You Came For," a representative for Swift confirmed.  Harris, Swift's ex, als... 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

People.com — Calvin Harris isn't the only star who has ended up in "Bad Blood" with Swift more info

CNN Showbiz — Just when you thought Taylor Swift's breakup with DJ Calvin Harris was amicable and so last month, things have gone south Hiddleswiftly. 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

TMZ — Taylor Swift is swinging back ... calling BS on Calvin Harris' Twitter tirade in which he claims he was the architect behind the hit song, "This Is What You Came For." Sources close to Taylor tell TMZ ... Calvin's intentionally downplaying her… ... more info

The Mirror — The singer has been involved in some very public spats over the years, here's the biggest... more info

The Mirror — Calvin Harris wreaked havoc on Twitter when he accused the star of trying to ruin fellow pop princess Katy Perry more info