Blake Shelton and girlfriend Gwen Stefani drop their duet 'Nobody But You' ahead of their Grammy Awards' performance

Mentioning how Nobody But You suits their love story, Blake Shelton recently said, "It fits my story. I was about to go in and record when I decided that it needed Gwen on it because it is our song. I think it's magic. I also realized how important it is for me and where I am in my life, and I think that's why Shane was trying to get it to me."