One of the few vocal groups on the Stax roster during the '60s, the Mad Lads' doo wop-influenced harmonies -- featuring the high, innocent tenor of John Gary Williams -- were more akin to what you might find in Philadelphia soul acts than those of their native Memphis. The group members were still in high school when the Mad Lads were signed to Stax in late 1964. In the mid-'60s, they enjoyed solid R&B hits with "Don't Have to Shop Around," "I Want Someone," and "I Want a Girl," although they never would cross over to the pop audience. Williams and fellow Mad Lad William Brown...