Taylor Swift delves into a "memory box" to pen songs about her exes. The country singer is said to have stored a necklace Harry Styles gave her in a special vintage trunk filled with mementos from her famous ex-boyfriends - including John Mayer, Taylor Lautner and Jake Gyllenhaal - which she uses for inspiration to write heartfelt songs about her break-ups. A source told The Sun newspaper: "Taylor's been working on a song about her split from Harry since they broke up. Her main source of material for the songs she's written about her string of other famous ex-boyfriends comes from rooting around in a trunk where she hoards keepsakes of their relationships. "Photos of Harry are now in there, along with a chain he had made for her when they got together last year which matches his own favourite necklace, of a paper plane. Trinkets like that should provide some easy material for her to build a song out of." Taylor and One Direction singer Harry called time on their short-lived relationship after a holiday in the Caribbean at the New Year and she allegedly set straight to work penning a handful of tracks about the curly-haired charmer.