Gwen Stefani took the stage on the Ellen DeGeneres show on Monday to debut her latest single Used to Love You, on TV. She donned a white sleeves tank top and a pair of cropped jeans while she teamed up her look with high heeled red boots. She belted out the lyrics 'You go, I'll stay, you can keep all the memories. I thought I was the best thing that ever happened to you, I thought you loved me the most,' She sang with passion in a heartfelt voice which detailed her heartbreak split from husband Gavin Rossdale.