From Wikipedia, the free encyclopedia. Omari Ishmael Grandberry (born November 12, 1984) better known as Omarion, is an American R&B singer, actor, songwriter, record producer, dancer, and former lead singer of the R&B group, B2K. Omarion was spotted at a young age by a manager, Christopher B. Stokes, who took a liking to his vocal abilities. This led to forming the group B2K, which disbanded after being successful for a... see more