<Tr> <Th> Belgium (Ultratop Wallonia) </Th> <Td> 21 </Td> </Tr> <Tr> <Th> Brazil (Brasil Hot 100) </Th> <Td> </Td> </Tr> <Tr> <Th> Canada (Canadian Hot 100) </Th> <Td> </Td> </Tr> <Tr> <Th> Denmark (Tracklisten) </Th> <Td> </Td> </Tr>

Who did justin bieber wrote the song love yourself about