The guys of One Direction have arguably the biggest adoring female fan base in the world, and each member has taken advantage of their heartthrob status by being linked to a beauty (or, for some, several). Whether their relationships to the hotties were truly boyfriend-girlfriend pairings, hot flings, or simply flirting that turned into wildfire-like rumors, there's no denying the One Direction romances have been filled with drama.
The most high-profile drama took the form of known 1D Casanova Harry Styles' relationship with Taylor Swift. After several months of long-distance dating, Taylor broke off the romance after supposedly witnessing Harry kissing another girl. Since then, Taylor has admitted her hit "I Knew You Were Trouble" was written about Harry, while Harry has gone on to call his relationship to Taylor "a pain in the arse."