<Tr> <Td_colspan="2"> <Table> <Tr> <Td> "Lonely Days" (1970) </Td> <Td> "How Can You Mend a Broken Heart" (1971) </Td> <Td> "Don't Wanna Live Inside Myself" (1971) </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> "Lonely Days" (1970) </Td> <Td> "How Can You Mend a Broken Heart" (1971) </Td> <Td> "Don't Wanna Live Inside Myself" (1971) </Td> </Tr> </Table> <Tr> <Td> "Lonely Days" (1970) </Td> <Td> "How Can You Mend a Broken Heart" (1971) </Td> <Td> "Don't Wanna Live Inside Myself" (1971) </Td> </Tr> <P> "How Can You Mend a Broken Heart" is a song released by the Bee Gees in 1971 . It was written mainly by Barry and Robin Gibb and was the lead and first single on the group's 1971 album Trafalgar . It was their first US No. 1 single and also reached No. 1 in Cashbox magazine for two weeks . </P>

Who sang how do you mend a broken heart first