B.O.B., Bruno Mars, Janelle Monae Grammy Performances [Video]

Rapper B.O.B and singer Bruno Mars came together again for this year's Grammy Awards to sing their smash hit, "Nothing On You." With the help of fellow singer Janelle Monae, the trio performed for the awards show, with Janelle singing her song "Cold War" also. Check out the three artists tearing the stage down:

[Props: Rap Radar]