<Tr> <Th> Belgium (Ultratop 50 Flanders) </Th> <Td> 20 </Td> </Tr> <Tr> <Th> Belgium (Ultratip Wallonia) </Th> <Td> 6 </Td> </Tr> <Tr> <Th> Canada (Canadian Hot 100) </Th> <Td> </Td> </Tr> <Tr> <Th> Czech Republic (Singles Digitál Top 100) </Th> <Td> 23 </Td> </Tr>

Who sings the background in nice for what