For Gwen Stefanis (57) 57th birthday on October 3, her husband Blake Shelton (50) came up with something special. The country singer put a photo series online, which shows the couple in familiar moments. On a black-and-white selfie they look deep into the eyes, on another picture they stand together between corn plants. As accompanying text Blake chose simple, cordial words: "The best at all! Everyone wishes @gwenstefani a nice birthday! I love …