Janet Jackson performs at the Super Bowl XXXVIII halftime show in 2004 in Houston. (Kevin Mazur/WireImage via Getty Images) Before the Super Bowl halftime show became the spectacle it is today ...

HOUSTON, TX – FEBRUARY 05: Lady Gaga performs during the Pepsi Zero Sugar Super Bowl 51 Halftime Show at NRG Stadium on February 5, 2017 in Houston, Texas. (Photo by Al Bello/Getty Images) ...

HOUSTON, TX – FEBRUARY 05: Lady Gaga performs during the Pepsi Zero Sugar Super Bowl 51 Halftime Show at NRG Stadium on February 5, 2017 in Houston, Texas. (Photo by Al Bello/Getty Images) HOUSTON, TX ...