LeAnn Rimes Debuts New Song at Sundance

LeAnn Rimes belts it out as she performs live at the ASCAP Music Cafe at the 2010 Sundance Film Festival in Park City, Utah on Monday (January 25).

The 27-year-old singer sang a new and untitled song, which she introduced by saying, “This song is going to make me cry!” (via Us Weekly).

The lyrics of the untitled song included the lines, “What have I done? I broke the heart of the sweetest man. What have I done? I broke the heart of the only man who’s ever loved me. Who have I become? I hope you find someone new, someone who deserves you.”

The jury’s out on this one – one source told Us Weekly that the song referred to LeAnn‘s ex-husband, Dean, while another insists it was written several years ago before any marital problems arose.

15+ pictures inside of LeAnn Rimes performing at Sundance…