Pop star Lady Gaga performs during the Super Bowl LI halftime show on Sunday, February 5. Tom Pennington/Getty Images

At the beginning of the show, Gaga appeared to sing "God Bless America" from the roof of Houston's NRG Stadium. Then she jumped down to the stage area. Patrick Smith/Getty Images

The stage is seen from above as Gaga performs. Morry Gash/AP

Gaga hangs in the air during her performance. Patrick Smith/Getty Images

Gaga played several of her most popular songs, including "Poker Face," "Telephone," "Just Dance" and "Born This Way." Jim Davis/The Boston Globe via Getty Images

Gaga performs on stage. Patrick Smith/Getty Images

Gaga mainly sang the choruses from her hit songs but when it came to her 2011 hit "Born This Way," she again offered another clear message of acceptance by choosing to sing lyrics from a verse towards the end of the song: "No matter gay, straight, or bi, Lesbian, transgendered life/I'm on the right track baby/I was born to survive." Christopher Polk/Getty Images

Dancers surround Gaga during the show. Patrick Semansky/AP

Gaga plays the keytar. Gregory Shamus/Getty Images

The stage is illuminated during the performance. Charlie Riedel/AP

Gaga sang the national anthem at last year's Super Bowl. Darron Cummings/AP

Gaga and dancers perform. Gregory Shamus/Getty Images

Audience members wave lights. Christopher Polk/Getty Images

Gaga plays "Million Reasons" on the piano. Al Bello/Getty Images

Gaga closed with "Bad Romance." Matt Slocum/AP