If You Don't Know Me by Now
Written by Kenny Gamble and Leon Huff, "If You Don't Know Me by Now" was recorded by Harold Melvin & the Blue Notes featuring Teddy Pendergrass on lead vocals, released as a single in September 1972. The song topped the US R&B chart and peaked at number 3 on the Billboard Hot 100, becoming their first hit and earning recognition as one of the "Songs of the Century" by the RIAA.