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Rihanna Possible Halftime Backup Dancers ... Trekking Across the Lot?!?

Rihanna is set to hit the stage during the Superbowl halftime show very shortly -- and you'd think NFL officials would already have her backup dancers inside by now ... you would think.

Check out this clip that our photog got about 25 minutes ago -- you see SCORES of people dressed in elaborate white outfits trekking across the parking lot just outside of State Farm Arena in Arizona (where the game is being held). The question ... are y'all with RiRi???

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That's exactly what we asked them -- especially seeing how they were trying to cover up with trash bags, attempting to head over on the DL, but sticking out like sore thumbs.

A few of them actually gave us answers ... including when we referred to them as "Rihanna's army." They seemed to confirm that, and one of them even told us how deep they were rolling ... there's about 280 of them, it seems.

We don't know for certain these are Rihanna's dancers, but the odds seem high based on what we're seeing/hearing right in front of us. If they are, it's a big old SMH to the people who planned this. There's gotta be some backdoor entrance/route they could've taken. 😅

It's almost showtime ... so we'll know here soon enough.

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