Simply Red - If You Don't Know Me By Now

"If You Don't Know Me by Now" is a song written by Kenny Gamble and Leon Huff, recorded by the Philadelphia soul musical group Harold Melvin & the Blue Notes in 1972. The British band Simply Red covered the song, releasing it on March 27, 1989. The cover became their second number one hit in the US, topping the Billboard Hot 100 for a week on July 15, 1989.