<Table> <Tr> <Th_colspan="2"> "Happy Days" </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Single by Pratt & McClain </Th> </Tr> <Tr> <Th_colspan="2"> from the album Pratt & McClain Featuring Happy Days </Th> </Tr> <Tr> <Th> Released </Th> <Td> 1976 </Td> </Tr> <Tr> <Th> Format </Th> <Td> Vinyl, 7 ", Single </Td> </Tr> <Tr> <Th> Recorded </Th> <Td> 1976 </Td> </Tr> <Tr> <Th> Genre </Th> <Td> Rock, Stage & Screen </Td> </Tr> <Tr> <Th> Length </Th> <Td> 2: 40 </Td> </Tr> <Tr> <Th> Label </Th> <Td> Reprise Records </Td> </Tr> <Tr> <Th> Songwriter (s) </Th> <Td> Charles Fox, Norman Gimbel </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Steve Barri, Michael Omartian </Td> </Tr> <Tr> <Th_colspan="2"> Pratt & McClain singles chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> "String Module Error: Match not found" (1976) </Td> <Td> "Happy Days" (1976) </Td> <Td> "Devil with a Blue Dress On" (1976) </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> "Whachersign" (1976) </Td> <Td> "Happy Days" (1976) </Td> <Td> "Devil with a Blue Dress On" (1976) </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "Happy Days" </Th> </Tr>

Who sang the original happy days theme song