Lady Gaga's going big for her Texas Super Bowl spotlight moment! The singer will reportedly sing some oldies by goodies during her highly-anticipated halftime show, including 2009's "Bad Romance." She and her backup dancers were rehearsing the choreography for the song in a video posted earlier this month.

Meanwhile, Gaga will do some of her choreography suspended from the roof of the stadium, as she confirmed recently. Apparently that was her sister Natali's idea. So in order to do that, she's been working out non-stop, every day, as evidenced by a recent Instagram the songstress posted ...

Training. Everyday all day 🏈🎤#superbowl #halftime

A photo posted by xoxo, Joanne (@ladygaga) on



But halftime performer isn't the only role Lady Gaga will play this Sunday ... she'll appear in a Tiffany & Co. ad, channeling Audrey Hepburn in a nod to classic Hollywood.

And Gaga's not the only one! No doubt Justin Beiber got paid a boatload of money to appear in this cheesy T Mobile commercial that will air during halftime. Yikes!