Gwen Stefani has a new song and video! The song is called “Used to Love You,” and I bet you can guess who the song is about. The video is a little weird, too. It’s Gwen mugging to the camera for 3:47 looking all sad. Someone on my Facebook called it “pained/divorce face.” Gwen performed the song for the first time Saturday night at the Hammerstein Ballroom. Watch below.