Az Yet is an American R&B group known for their vocal harmonies and romantic ballads. The group, formed in 1989 in Philadelphia, originally consisted of Dion Allen, Shawn Rivera, Kenny Terry, and Claude Thomas. They gained fame through their hit singles "Last Night" and "Hard to Say I'm Sorry", which showcased their smooth, harmonious sound and soulful style. With their blend of traditional R&B and contemporary pop, Az Yet has contributed to the evolution of the R&B genre.