VIDEO : First Song for Gwen Stefani Since Divorce From Gavin Rossdale

Gwen Stefani debuted a new track titled "Used to Love You" ? the No Doubt singer's first new song since announcing her divorce from Gavin Rossdale ? during her MasterCard Priceless Surprises concert Saturday at New York's Hammerstein Ballroom. The emotional ballad appears to be inspired by Stefani's break from her husband of 13 years, as Stefani sings on the chorus, "I don?t know why I cry / But I think it?s cause I remember for the first time / Since I hated you / That I used to love you."