When the call went out for for physically fit, athletic males for Madonna's Super Bowl halftime show ... Gage Davis and Tyler Graham signed up.

Davis and Graham, a Penn High School senior and Indiana University South Bend freshman, explained why the requirement for fit and athletic. "Our outfits are slightly revealing," Davis says.

If Davis and Graham are, perhaps, a bit intimidated ... so is Madonna. She revealed on Anderson Cooper's show that she has to "put on the greatest show on earth in the middle of the greatest show on earth.

Davis and Graham have spent weekends in 7-hour rehearsals, but aren't allowed to detail specifically what they'll be doing in the halftime show. Both guaranteed the show is "going to be awesome."