Gladys Knight has signed on to sing "The Star-Spangled Banner" at next month's Super Bowl in Atlanta. "Atlanta, I'm coming home! #NFL #SBLIII," the music legend tweeted Thursday morning, along with a promotional poster for the Feb. 3 event. The NFL also announced Knight would help kick off the game. Pop group Maroon 5 was confirmed last weekend as the headliner for the professional football game's halftime show. Travis Scott and Big Boi are expected to be guest performers.