Singer-composer Bill Dees, best known for his songwriting collaboration with Roy Orbison on the hits Oh, Pretty Woman and It's Over, has died at age 73 in Mountain Home, Arkansas, according to an obituary posted online by a local funeral home. Dees, a Texas native who got his start in the 1950s with a high school band called the Five Bops, is credited with writing scores of songs, some recorded by such performers as Johnny Cash, Loretta Lynn and Glen Campbell.