<Tr> <Th> Starring </Th> <Td> Pauline Quirke Linda Robson Lesley Joseph Samuel James Charlie Quirke </Td> </Tr> <Tr> <Th> Theme music composer </Th> <Td> Irving Berlin </Td> </Tr> <Tr> <Th> Opening theme </Th> <Td> "What'll I Do?" performed by Linda Robson & Pauline Quirke </Td> </Tr> <Tr> <Th> Ending theme </Th> <Td> "What'll I Do?" </Td> </Tr>

Who sings the theme tune to birds of a feather