Some of his songs have been recorded by Sammy Davis Jr., Bette Midler, Eddy Arnold, Tom Jones, Merle Haggard, Ricky Nelson, Elvis Presley, Gene Pitney and Johnny Cash.
His film career began in 1958 starring in Senior Prom. Many television appearances ensued such as The Doris Day Show, The Smothers Brothers Comedy Hour, McCloud, Ironside, Combat!, Benson and others. Some notable movie appearances were in Lady Sings the Blues, Hit!, More Dead than Alive," and the award-winning television show Never Forget. Hampton continues to act and compose today (2010).
In 2008 Tony award winning actress and singer Idina Menzel recorded Hampton's song "Hope" for the Major League Baseball Stand Up To Cancer
He is the ASCAP award-winning songwriter for "Sea of Heartbreak", used in the soundtrack for the films The Butcher Boy, Perfect World, Heartbreak Ridge and Clay Pigeons.
In 2010 singer Rosanne Cash covered the song in a duo with Bruce Springsteen which received a Grammy nomination and was promoted as the
single from her album The List.