One of the finest groups in contemporary gospel, the L.A.-based Mighty Clouds of Joy were formed in the '50s and started out in a tradition-based style. Eventually they added soul, R&B, and rock flourishes into their musical mix (one of their early hits was produced by Philly soul czars Gamble and Huff) without diluting the essential religious essence of their material. The long-lived group flourished into the 21th century, scoring numerous Grammy wins and nominations and hit albums along the way.