Birth name Ocaya Stephen Sunday popularly known as CMB is a Northern Uganda singer, songwriter and performer.

He started doing music in 2005 while under Valley Curve records label own by the late Ugandan prominent rapper Lumix Da Don.

He went schools such as Gulu Central, Eagleness High School in Kampala and later joined Kalinabiri High School in Kampala.

CMB is now signed to Skylight Promotion under renowned Promoter Badman Solo.