Blake Shelton and Gwen Stefani will be performing at the 2020 Grammy Awards on Jan. 26. Blake shared the news via Instagram, saying: “Nobody but you, @gwenstefani, that I’d want to share this year’s @recordingacademy #GRAMMYs stage with! Tune-in Jan. 26th to watch our performance.” As Blake alluded to in his post, he and Gwen…