Bernard Wilson , Soul singer, "If You Don't Know Me by Now," dies 64

Bernard Wilson (1946 – December 26, 2010) was a second tenor and baritone R&B, funk and soul music vocalist who was a member of Harold Melvin & the Blue Notes and thus helped to define the “Sound of Philadelphia” in the 1970s.

Death of Bernard Wilson
Bernard Wilson died at a hospital in New Jersey after suffering a stroke and a heart attack.  Bernard Wilson was 64 years old at the time of his death

Harold Melvin & The Blue Notes - If You Don't Know Me By Now

Bernard Wilson is on the far right (red, orange)
Lead Singer is Teddy Pendergrass (March 26, 1950 — January 13, 2010)