<Tr> <Th> "Santa Baby" </Th> <Td> Taylor Swift </Td> <Td> Joan Javits Philip Springer Tony Springer </Td> <Td> Sounds of the Season </Td> <Td> 2007 </Td> <Td> </Td> </Tr> <Tr> <Th> "September" (cover) </Th> <Td> Taylor Swift </Td> <Td> Maurice White Al McKay Allee Willis </Td> <Td> Spotify Singles </Td> <Td> 2018 </Td> <Td> </Td> </Tr> <Tr> <Th> "Shake It Off" </Th> <Td> Taylor Swift </Td> <Td> Taylor Swift Max Martin Shellback </Td> <Td> 1989 </Td> <Td> 2014 </Td> <Td> </Td> </Tr> <Tr> <Th> "Should've Said No" </Th> <Td> Taylor Swift </Td> <Td> Taylor Swift </Td> <Td> Taylor Swift </Td> <Td> 2006 </Td> <Td> </Td> </Tr>

What is taylor swift's most recent song