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Olivia Barker, USA TODAY
Crazy in love with Beyonce? 100 fans will get to show their devotion to the diva when they join her on the world's biggest music stage: the Super Bowl halftime show.

But first, these wannabe Sashas have to prove how fierce they really are.

Pepsi announced today that starting Saturday, fans can submit photos of themselves striking various poses: head-bopping, feet-tapping and hip-shaking. The pictures will be incorporated into a TV ad introducing the Superdome show on Feb. 3 in New Orleans; 50, plus a friend, will join the Grammy winner on the field.

Nail those moves now: Those who want to play backup to Beyonce live must get their photos in by Jan. 11; those who love the camera but hate the idea of the world watching have until Jan. 19.