Where is the super bowl halftime show held?
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Where was the 2017 super bowl halftime show held?
NRG Stadium, Houston, TX
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Where was the 2016 super bowl halftime show held?
Levi's Stadium, Santa Clara, CA
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Where was the 2015 super bowl halftime show held?
University of Phoenix Stadium, Glendale, AZ
Super Bowl LI halftime show
https://en.wikipedia.org/wiki/Super%20Bowl%20LI%20halftime%20show
The Super Bowl LI Halftime show took place on February 5, 2017 at NRG Stadium in Houston, Texas, as part of Super Bowl LI. Lady Gaga headlined the show, with no special guests (the first since Super Bowl XLIV), performing a medley of her songs, including material from her then-most recent studio album, Joanne (2016). 
Super Bowl LI halftime show
Super Bowl 50 was an American football game to determine the champion of the National Football League (NFL) for the 2015 season. The American Football Conference (AFC) champion Denver Broncos defeated the National Football Conference (NFC) champion Carolina Panthers, 24–10. The game was played on February 7, 2016, at Levi's Stadium in Santa Clara, California, in the San Francisco Bay Area. 
Super Bowl 50
On December 3, the league confirmed that the show would be headlined by the British rock band Coldplay.
Super Bowl 50
On October 9, 2014, Billboard announced that Katy Perry would perform at halftime and the NFL confirmed the announcement on November 23, 2014.
Super Bowl XLIX
 The Super Bowl LI Halftime show took place on February 5, 2017 at NRG Stadium, Houston, TX as part of Super Bowl LI. Lady Gaga headlined the show.  Super Bowl 50 took place February 7, 2016 at Levi's Stadium, Santa Clara, CA with Coldplay headlining the halftime show. The halftime show for Super Bowl XLIX  in 2015 was in University of Phoenix Stadium, Glendale, AZ with Katy Perry  headlining.