Bob Babbitt
Thom Bell
Carla Benson
Evette Benton
Jean Carne
George Clinton
Charles Collins
T. Conway
Carolyn Crawford
Lamont Dozier
Bobby Eli
Jimmy Ellis
The Funk Brothers
Major Harris
William "Poogie" Hart
  of the Delfonics

Carl Helm
Rikki Hicks
Eddie Holland, Jr.
Joe Hunter
Phil Hurtt
Darryl Johnson, Sr.
The Velvelettes
Robert Jones
Uriel Jones
Gene Leone
Barbara Mason
Clay McMurray
Ted Mills of Blue Magic
Ray Monette
Vince Montana, Jr.
Philly Degrees
Freda Payne
Bunny Sigler
Kathy Sledge
Bobby Taylor
Russell Thompkins, Jr.
Nathaniel "Crocket" Wilkie
Jimmy Williams
Eddie Willis
Spider Webb
Kim Weston
Treaty Womack
Ali "Ollie" Woodson
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Carla Benson and Evette Benton (The Sigma Sweethearts – Philadelphia)

Listen to any number of hits from the heyday of Philadelphia soul and chances are you are hearing the exquisite harmonies of these ladies. Along with the late Barbara Ingram, the “Sigma Sweethearts” added an indefinable quality to the Philadelphia sound, lending backing vocals to The Spinners, The Trammps, Phil Hurtt, Elton John, McFadden & Whitehead and countless others.