Luniz is a duo from Oakland, California, formed by Yukmouth and Numskull. The group is best known for the internationally successful hit in 1995 titled "I Got 5 on It". The two friends who knew each other since junior high and gained fame after six years together when they appeared on Dru Down's Explicit Game album. Their debut album, Operation Stackola, was released in 1995 and knocked Michael Jackson's HIStory off the top of Billboard Top R&B/Hip-Hop Albums chart on the strength of the Club Nouveau-sampling platinum hit single "I Got 5 on It," which featured guest vocals by Michael Marshall of Timex Social Club. The album's lyrics took novel, comic approaches to sex, drugs, and everyday occurrences. The follow up albums, Lunitik Muzik (1997) and Silver & Black (2002) didn’t fared as well as the debut, and they subsequently split.