<Table> <Tr> <Th_colspan="2"> 5 Seconds of Summer </Th> </Tr> <Tr> <Td_colspan="2"> 5 Seconds of Summer in 2016 </Td> </Tr> <Tr> <Th_colspan="2"> Background information </Th> </Tr> <Tr> <Th> Also known as </Th> <Td> 5SOS </Td> </Tr> <Tr> <Th> Origin </Th> <Td> Sydney, New South Wales, Australia </Td> </Tr> <Tr> <Th> Genres </Th> <Td> <Ul> <Li> Pop rock </Li> <Li> pop punk </Li> <Li> power pop </Li> <Li> pop </Li> </Ul> </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 2011--present </Td> </Tr> <Tr> <Th> Labels </Th> <Td> <Ul> <Li> Capitol </Li> <Li> Hi or Hey </Li> </Ul> </Td> </Tr> <Tr> <Th> Associated acts </Th> <Td> <Ul> <Li> Alex Gaskarth </Li> <Li> The Madden Brothers </Li> <Li> John Feldmann </Li> </Ul> </Td> </Tr> <Tr> <Th> Website </Th> <Td> 5sos.com </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th> Members </Th> <Td> <Ul> <Li> Luke Hemmings </Li> <Li> Calum Hood </Li> <Li> Ashton Irwin </Li> <Li> Michael Clifford </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> 5 Seconds of Summer </Th> </Tr>

Who are the members of 5 seconds of summer