Taylor Swift wants Selena Gomez to write about Justin Bieber

London: Country star Taylor Swift reportedly wants her friend Selena Gomez to follow in her footsteps by writing songs about her past relationships - starting with Justin Bieber.The 24-year-old `I Knew You Were Trouble` hitmaker is notorious for writing about her previous relationships, and she has told her best friend to write about the `Beauty and a Beat` hitmaker in an effort to get over him, reportedly. "Taylor`s been encouraging Selena got write down her feelings and emotions, and record," a source said. Bieber and the `Spring Breakers` actress have had a difficult on-off romance, and it is said they split again last month. Throughout this tough time, Swift is said to have stood by her friend - and there`s eve a chance they could collaborate on Gomez`s album.