One of the most popular duos of modern R&B, K-Ci & JoJo, is back with an incredible new single, 'Knock It Off.' The song makes an immediate impression as an instant R&B classic. K-Ci & JoJo (brothers Cedric 'K-Ci' Hailey and Joel 'JoJo' Hailey) new album My Brother's Keeper delivers the classic R&B sound that has garnered them hit after hit. The duo has seen much success as one half of R&B group Jodeci, and as a duo. As K-Ci & JoJo, they have released five studio albums to date, plus a successful greatest hits album and numerous singles for theatrical films.