The Solid Gold Girl(1964)

While searching for the man who framed him for a crime he didn't commit, Harrison Destry (John Gavin) stumbles into a town where an old cell mate of his is being tried for robbery and murder. The outlaw has hidden the loot and offers to reveal the location to Destry, but instead provides the location to Patience Dailey, a gold digging saloon singer played by Tammy Grimes.