On their fourth album, Zap Mama slide even further away from their early manifestation as a cappella group singing the traditional pygmy chants of West Africa--but this isn't necessarily a bad thing. Enlisting notable Philly hip-hop artists the Roots as well African pop star Manu Dibango, Zap Mama blend the traditional singing for which they gained notoriety with the modern beats of drum & bass and hip-hop. The mix steams up a breathy, sensual brand of Euro-African-American pop. "Comment Ça Va?" swivels in and out of slow hip-hop beats; dark, twanging oudlike bass; and lead singer Marie Daulne's delicate vocals. "'Allo 'Allo" goes light on the sax and heavy on the hook, bringing a funky, playful edge to the collection. "Kemake" grooves understatedly with organ and a soulful, spinning vocal, demonstrating this group's diversified sound. The upbeat French Afro-hip-hop of Les Nubians Zap Mama are not: these women entice with a subtle, underground sound that's all their own. --Karen K. Hugg