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Keith is set to play guitar and provide some backing vocals for Faith. Keith will also perform his hit "You'll Think of Me" on the show. In rehearsals for the song, Keith, who's been battling a cold, joked about his voice, according to CMT. Instead of singing the line I'll feel a whole lot better, Keith playfully changed it to, I sure wish I felt a whole lot better. During the live telecast, Keith will finish that song and then join Faith for their collaboration. The Grammy awards will be broadcast Wed. night, Feb. 8, from Los Angeles on CBS, beginning at 8:00 p.m. ET.