Dr. John was also a prominent session musician throughout his career. He provided back-up vocals on the Rolling Stones' 1972 song "Let It Loose", and backed Carly Simon and James Taylor in their duet of "Mockingbird" (from "Hotcakes") in 1974, and Neil Diamond on "Beautiful Noise" in 1976. He also contributed the song "More and More" to Simon's "Playing Possum" album. He played on three songs on Maria Muldaur's 1973 solo debut album, including his composition "Three Dollar Bill". He sang on four songs and played piano on two songs on Muldaur's 1992 "Louisiana Love Call". He was co-producer on Van Morrison's 1977 album "A Period of Transition" and also played keyboards and guitar. He contributed three songs as writer or co-writer ("Washer Woman", "The Ties That Bind", and "That's My Home") and also played guitar and keyboards on Levon Helm's 1977 release, "Levon Helm & the RCO All-Stars". He performed on the March 19, 1977 episode of NBC's "Saturday Night Live".