Rihanna made history at this year's Super Bowl halftime show when she became the first pregnant woman to perform at the big game. The high-flying performance also served as a pregnancy reveal and baby bump debut, shocking fans around the world.ET's Kevin Frazier spoke with the halftime show director, Hamish Hamilton, about the fireworks-filled extravaganza, and how they kept both the secret of Rihanna's pregnancy -- and Rihanna herself — safe.The incredible performance began with Rihanna hovering more than 60 feet in their air on a suspended platform above the field at State Farm Stadium in Glendale, Arizona, where she kicked things off singing «B***h Better Have My Money.»«For her, I’m sure it was really scary, because, you know, she's not fond of heights either.