Mason Durell Betha, better known by his mononym Mase, is an American rapper, songwriter and minister. In the late 1990s he recorded at Bad Boy Records alongside Sean "Diddy" Combs. From 1996 to 1999, as a lead or featured artist, Mase had six Billboard Hot 100 Top 10 singles and five US Rap No. 1 singles. His 1997 album Harlem World was Grammy nominated and certified quadruple Platinum by RIAA. His two other albums, Double Up and Welcome Back, are both certified Double platinum and Gold by RIAA.