Gaga, who recently split from Luc Carl, wrote her tune You And I for him when the couple were still together and she says performing it now brings up memories from the past.
The 25-year-old told US Weekly: 'There is not one song on any of my records that wasn't written by me, and I think when you write your own music you find ways to reinvent [the songs] emotionally through yourself and performance so that they are different every night and that song you know, sometimes it's about the guys and sometimes its about the fans.'