This duo met through a mutual friend, Ellie Goulding, back in February of 2015 at The Brit Awards and immediately hit it off. As one of Swift's longest running relationships, the couple was a match made in music heaven, spending July 4 holidays together on the beach and celebrating their one year with a homemade cake (all documented on Instagram.) Of course, all good things come to an end, and when it got ugly, it got really ugly (via Twitter). In Swift's single music video for "Look What You Made Me Do", she lends an eery nod to Harris by crawling out of a graveyard next to a headstone reading "Nils Sjoberg," which was the psydenom the singer used to conceal her identity on Harris and Rihanna's hit track, "This is What You Came For".