Musicians Joe Hunter and Jack Ashford

Spector, who died Jan. 12, was part of the 1960s girl group that gave us "Be My Baby." She left the music business for some years but returned to recording in the 1970s. Originally broadcast in 1988.

While with Motown, Knight & The Pips turned out a slew of hits, including "I Heard It Through the Grapevine," which they performed at the 1969 Harlem Cultural Festival. Originally broadcast in 1996.

She has a new solo recording out this month, At Last. Knight began her singing career at age 4. Since that modest start, she went on to lead one of the most successful vocal soul groups in America, Gladys Knight and The Pips. The group stayed together for 39 years before disbanding.Among, the group's most notable songs include: I Heard It Through The Grapevine, Neither One of Us, and Midnight Train to Georgia. Knight then launched a solo career. Terry interviewed Knight before a live audience in San Francisco in 1996.