Through the decade of the 1970s, Ingram, Benson and Benton comprised the in-house backup group for Philadelphia International Records, known as the Sweethearts of Sigma.
They worked for producer and Philadelphia soul co-creator Thom Bell, as well as backing a number of acts that came through to record in the closely related Sigma Sound Studios.
Throughout the years, from 1975 until 1985 she sang backup for The Salsoul Orchestra, Grace Jones, Cat Stevens, The Spinners, Eddie Kendricks, Major Harris, Cindy Williams, Phyllis Hyman, Double Exposure, Billy Paul, Loleatta Holloway, Evelyn King, Philippé Wynne, Dick Jensen, Claudja Barry, Elkie Brooks, Lou Rawls, Brenda Mitchell, The Trammps, Stevie Wonder, Marvin Gaye, Luther Vandross, Sister Sledge, Dexter Wansel, among others for their albums.
Ingram was married to songwriter/producer Sherman Marshall, who wrote famous 1970s hits such as "I'm Doin' Fine Now" by New York City, "Then Came You" by the Spinners and "Lady Love" by Lou Rawls.
According to the book, A House on Fire: The Rise and Fall of Philadelphia Soul by John A. Jackson,[3] Ingram suffered from both lupus, and cancer.