David Pack, born David Robert Pack in Huntington Park, California, United States, on July 15, 1952, is an American singer, songwriter, guitarist, and record producer best known as the co-founder, lead vocalist, and guitarist of the rock band Ambrosia. He co-wrote and performed Ambrosia's debut top 20 single, “Holdin' On to Yesterday”, in 1975, and wrote their 1980 hit single “Biggest Part of Me”, which earned three Grammy Award nominations. He launched his solo recording career with his debut studio album, Anywhere You Go, on Warner Bros. Records in 1985, yielding the single “I Just Can't Let Go” featuring James Ingram and Michael McDonald, which reached number 13 on the US Billboard Adult Contemporary chart. His solo studio albums include Unborn in 2004 and The Secret of Movin' On in 2005. He performed the duet “I Know You by Heart” with Bette Midler for the 1988 film soundtrack Beaches, and produced Grammy Award-winning tracks including Patti Austin's “But Who May Abide” on Handel's Messiah: A Soulful Celebration in 1992 and the finale “To God Be the Glory” on Tribute: The Songs of Andrae Crouch in 1997. His production credits include Kenny Loggins' studio album Return to Pooh Corner in 1994 and Wynonna Judd's studio album The Other Side in 1997. He stopped touring with Ambrosia in 2000.