With their early 1990s hit "Motownphilly," Boyz II Men assured their status as big-time chart-toppers, able to control the No. 1 spot for weeks at a time (often only to be replaced by another one of their singles). Their tight harmonies give a nod to the Doo-Wop artists of the 1950s, while crisp production assures a distinctly modern sound. They've had success with smoking R&B dance tracks, but their true talent lies in their rendering of syrupy romantic ballads that can drive just about anyone to tears. Their perfect A Cappella songs can melt your heart like butter, moving through open chords with exacting precision. Scores of weak imitations later, Boyz II Men continue to sell millions of records as they work with hot producers like Babyface and superstar singers such as Mariah Carey.