<Table> <Tr> <Td> "I Miss You" (1972) </Td> <Td> "If You Don't Know Me by Now" (1972) </Td> <Td> "Yesterday I Had the Blues" (1973) </Td> </Tr> </Table> <Tr> <Td> "I Miss You" (1972) </Td> <Td> "If You Don't Know Me by Now" (1972) </Td> <Td> "Yesterday I Had the Blues" (1973) </Td> </Tr> <P> "If You Don't Know Me by Now" is a song written by Kenny Gamble and Leon Huff, and recorded by the Philly soul musical group Harold Melvin & the Blue Notes . It became their first hit after being released as a single in 1972, topping the US R&B chart and peaking at number three on the US Pop chart . </P> <P> The song was originally written for Labelle (a trio led by Patti LaBelle) but they never recorded it . Much like the issue with "I Miss You" and The Dells passing on it, the song's composers Kenny Gamble and Leon Huff gave the song to Harold Melvin & the Blue Notes, which featured Teddy Pendergrass as lead vocalist . In addition to the single release, the song was included on their debut album I Miss You . </P>

Who was the original singer of if you don't know me by now