Ouch!

Gwen Stefani debuted her new song "Used to Love You" at the MasterCard Priceless Surprises concert at the Hammerstein Ballroom over the weekend, and it certainly sounds like it was written about her split with Gavin Rossdale.

"I just want to share a song that I wrote recently. This song is really special," she told the crowd. With lyrics like "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;" "I thought I was the best thing that ever happened to you” and “I guess nobody taught you how to love," it seems the blonde beauty is turning her heartache into hits!

The No Doubt songstress confessed that the songwriting process has definitely cathartic for her. "I needed to go through what I needed to go through to write the record that I needed to write. There was a lot of prayer and meditating in the sense of trying to be open and grateful with this record. These songs are really natural — they’re from not worrying about what happened or what’s going to happen but about living in the moment, from trying to be present and trying to feel," she told EW.

Anything she touches turns to gold!