"Not Today" is a song by American singer Mary J. Blige, featuring guest vocals by rapper Eve. It was written by Blige, Eve, Dr. Dre, Mike Elizondo, Theron Feemster, and Bruce Miller for her sixth studio album Love & Life (2003), while production was helmed by Dr. Dre. It was released as the album's third single in 2003, also serving as a promotional single to the soundtrack of the motion picture Barbershop 2: Back in Business (2003).