Omari Ishmael Grandberry (born November 12, 1984), known by his stage name Omarion, is an American singer, songwriter, rapper, actor and dancer. He is best known as the lead singer of the American R&B boy band B2K. The group achieved success in the early 2000s with singles like "Bump, Bump, Bump", "Uh Huh", and "Girlfriend", which all reached success on the Billboard Hot 100. After the group disbanded in 2004, Omarion embarked on a solo career and released his debut album, O in 2005, which debuted at the top of the Billboard 200 chart, and received a Grammy Award nomination for Best Contemporary R&B Album at the 48th Grammy Awards.