<Table> Super Bowl LI halftime show <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Date </Th> <Td> February 5, 2017 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Houston, Texas </Td> </Tr> <Tr> <Th> Venue </Th> <Td> NRG Stadium </Td> </Tr> <Tr> <Th> Headliner </Th> <Td> Lady Gaga </Td> </Tr> <Tr> <Th> Sponsor </Th> <Td> Pepsi </Td> </Tr> <Tr> <Th> Director </Th> <Td> Hamish Hamilton </Td> </Tr> <Tr> <Th> Producer </Th> <Td> Ricky Kirshner </Td> </Tr> <Tr> <Th_colspan="2"> Super Bowl halftime show chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> 50 (2016) </Td> <Td> LI (2017) </Td> <Td> LII (2018) </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th> Date </Th> <Td> February 5, 2017 </Td> </Tr>

Who sang at super bowl 2017 half time
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