<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2015) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2015) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Th_colspan="2"> One Day at a Time </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Genre </Th> <Td> Sitcom </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Whitney Blake Allan Manings </Td> </Tr> <Tr> <Th> Developed by </Th> <Td> Norman Lear </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> <Ul> <Li> Norman Campbell Herbert Kenwith Sandy Kenyon Howard Morris Noam Pitlik Alan Rafkin Don Richardson Tony Singletary </Li> </Ul> </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Bonnie Franklin </Li> <Li> Mackenzie Phillips </Li> <Li> Richard Masur </Li> <Li> Valerie Bertinelli </Li> <Li> Pat Harrington </Li> <Li> Mary Louise Wilson </Li> <Li> Michael Lembeck </Li> <Li> Ron Rifkin </Li> <Li> Glenn Scarpelli </Li> <Li> Boyd Gaines </Li> <Li> Shelley Fabares </Li> <Li> Nanette Fabray </Li> <Li> Howard Hesseman </Li> </Ul> </Td> </Tr> <Tr> <Th> Theme music composer </Th> <Td> Jeff Barry Nancy Barry </Td> </Tr> <Tr> <Th> Opening theme </Th> <Td> "This is It" performed by Polly Cutter </Td> </Tr> <Tr> <Th> Ending theme </Th> <Td> "This is It" (instrumental) </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> Jeff Barry </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> Original language (s) </Th> <Td> English </Td> </Tr> <Tr> <Th> No. of seasons </Th> <Td> 9 </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 209 (list of episodes) </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> <Ul> <Li> Dick Bensfield </Li> <Li> Jack Elinson </Li> <Li> Perry Grant </Li> <Li> Mort Lachman </Li> <Li> Norman Lear </Li> <Li> Alan Rafkin </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> <Ul> <Li> Dick Bensfield </Li> <Li> Patricia Fass Palmer </Li> <Li> Perry Grant </Li> <Li> Katherine Green </Li> <Li> Allan Manings </Li> <Li> Bud Wiser </Li> </Ul> </Td> </Tr> <Tr> <Th> Camera setup </Th> <Td> Multi-camera setup, videotape </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 24 minutes </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> T.A.T. Communications Company (1975--82) Embassy Television (1982--84) </Td> </Tr> <Tr> <Th> Distributor </Th> <Td> <Ul> <Li> T.A.T. Communications Co. (1980--82) </Li> <Li> Embassy Telecommunications (1982--86) </Li> <Li> Embassy Communications (1986--88) </Li> <Li> Columbia Pictures Television (1988--95) </Li> <Li> Columbia TriStar Television (1995 - 2002) </Li> <Li> Sony Pictures Television (2002 - present) </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> CBS </Td> </Tr> <Tr> <Th> Audio format </Th> <Td> Monaural </Td> </Tr> <Tr> <Th> Original release </Th> <Td> December 16, 1975 (1975 - 12 - 16)--May 28, 1984 (1984 - 05 - 28) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> One Day at a Time </Th> </Tr>

Who sang the one day at a time theme song