Singer/songwriter Babyface joined Grande for `` Signed , Sealed , Delivered , I 'm Yours . '' `` Songs in the Key of Life : An All-Star Grammy Salute '' aired Monday . Performers sang Wonder songs . The show was taped at the Staples Center and will air on CBS Sunday night with a special one-hour episode that features performances by Stevie Wonder, Mary J. Blige, Alicia Keys, Michael Jackson, Mariah Carey, Boyz
`` Songs in the Key of Life : An All-Star Grammy Salute '' aired Monday . Performers sang Wonder songs . The show was taped at the Staples Center and will air on CBS Sunday night with a special one-hour episode that features performances by Stevie Wonder, Mary J. Blige, Alicia Keys, Michael Jackson, Mariah Carey, Boyz