King provided backing vocals for Humble Pie, which had great success in the United States, and she went on to become an in-demand session singer, worked with [a=Venetta Fields] and [a=Sherlie Matthews] and recorded with B.B. King, The Rolling Stones, Steely Dan, Barbra Streisand, Bob Dylan, Linda Ronstadt, Joe Cocker, Dickey Betts, Joe Walsh, and many others.

She was a member of The [a=Blackberries] with Fields and Matthews and sang on Joe Cocker's Mad Dogs and Englishmen tour, which became a feature film.