<Tr> <Th> South Korea (Gaon) </Th> <Td> </Td> <Td> 210,000 </Td> </Tr> <Tr> <Th> Sweden (GLF) </Th> <Td> 2 × Platinum </Td> <Td> 80,000 </Td> </Tr> <Tr> <Th> United Kingdom (BPI) </Th> <Td> Gold </Td> <Td> 400,000 </Td> </Tr> <Tr> <Th> United States (RIAA) </Th> <Td> 3 × Platinum </Td> <Td> 3,000,000 </Td> </Tr>

Who did taylor swift write ready for it about