Listen to If You Don't Know Me by Now online. If You Don't Know Me by Now is an English language song and is sung by Harold Melvin and The Bluenotes. If You Don't Know Me by Now, from the album Los Clásicos De Los Años 70, Vol. 1, was released in the year 2017. The duration of the song is 3:28. Download English songs online from JioSaavn.