<Tr> <Th> Instruments </Th> <Td> Piano </Td> </Tr> <Tr> <Th> Associated acts </Th> <Td> The Four Seasons Royal Teens </Td> </Tr> <P> Robert John "Bob" Gaudio (born November 17, 1942) is an American singer, songwriter, musician, and record producer, and the keyboardist / backing vocalist for The Four Seasons . </P> <P> Born in the Bronx, New York, he was raised in Bergenfield, New Jersey, where he attended Bergenfield High School . His mother worked for the publishing house Prentice Hall and his father in a paper factory . He showed an interest in music and studied piano with Sal Mosca . </P>

Who wrote the songs for the four seasons