Boyz II Men

Boyz II Men is an American R&B vocal group from Philadelphia, Pennsylvania, best known for emotional ballads and a cappella harmonies. They are currently a trio composed of baritone Nathan Morris alongside tenors Wanya Morris and Shawn Stockman. During the 1990s, Boyz II Men found fame on Motown Records as a quartet including bass Michael McCary, who left the group in 2003 due to health issues.

Source: https://en.wikipedia.org/wiki/Boyz_II_Men