Gwen Stefani and Blake Shelton join the admirable list of couples who star in each other's music videos-- the true indicator of love. Stefani appeared in Shelton's music video for the song "Nobody But You." The song is a duet with Stefani and Shelton has previously shared that he feels the lyrics describe their relationship perfectly. Despite their obvious love, the couple has yet to tie the knot or even pop the question. According to Showbiz Cheat Sheet, Shelton would feel honored to be married to Stefani.