What happens when you mix a bit of gris-gris with a touch of classic jazz? You get a party of an album such as Dr. John's Ske-Dat-Ske-Dat: The Spirit of Satch! The late Mac Rebennack, a.k.a. Dr. John, frequently drew on the classic sounds of New Orleans as he conjured his own musical voodoo. Most appropriately, his final studio album was a tribute to one of the most significant figures to ever emerge from the Crescent City. Louis Armstrong transformed the sounds of both jazz and popular music,