Co-written and first recorded by Dennis Lambert (1972).
Hit versions by The Righteous Brothers (US #32 1974), The Oak Ridge Boys (C&W #1 1980).
From the wiki: “‘Dream On’ was written by Dennis Lambert and Brian Potter, and is best-known for the cover recorded by The Oak Ridge Boys in 1980. Lambert first recorded the song in 1972; The Righteous Brothers covered the song two years later for their final Top 40 appearance in the Billboard Hot 100 (except for the 1990 re-issues of ‘Unchained Melody’ and ‘You’ve Lost That Lovin’ Feeling’). ‘Dream On’ is the only Oak Ridge Boys single to feature bass singer Richard Sterban on lead vocals.”