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It's not hard to guess what LeAnn Rimes is singing about in her brand-new song, "What Have I Done."

"Oh my love, what have I done? / I shot an arrow at your heart that I can't take back / When I said you were my first love, but you are not my last," she laments in the first verse. (Watch LeAnn sing the ballad in an intimate performance below.)

The 30-year-old star tells ABC News that when her ex-husband, Dean Sheremet, first heard the song, he "probably knew what it was about before I did." She goes on to explain that the lyrics were born out of a lingering guilt she's carried over the way her first marriage ended.

Blog Source: www.TheBoot.com