(Cover) - EN Showbiz - Taylor Swift plans to write an autobiography - but not until she's 80.

The 22-year-old singer has dated a string of famous men including Joe Jonas, Taylor Lautner, John Mayer and Jake Gyllenhaal. She is currently in a relationship with Conor Kennedy and is famed for penning songs about her ex-boyfriends.

Despite her colourful romantic past, Taylor isn't sure she has enough material for a book about her life.

"I could write an autobiography. I think I'd have to be about 80 for it to be interesting enough though," she laughed to Heat magazine.

John believes several of Taylor's tracks are about him and has publicly slammed her for referencing their romance in her music. She refused to comment on his remarks and insists expressing herself through lyrics is all she knows.

I Knew You Were Trouble is thought to be about the famous lothario and includes the words, "A new notch in your belt is all I'll ever be." Although Taylor stopped short of confirming the subject matter, she was happy to open up about the track.

"[It's] kind of being frustrated with yourself because you have your heart broken and you knew when you first saw that person you saw all these red flags and you went for it anyway," she said. (C) Cover Media