BRITNEY SPEARS' booty is about to get her banned from her sons' soccer games!

The "Scream & Shout" singer caused an uproar at a match in Calabasas, Calif., on March 10 when she bared her naked bottom in front of dozens of young kids and their horrified parents.

No stranger to skimpy attire and eye-popping wardrobe malfunctions, the 31-year-old wore a see-through, flowing sundress — and no undergarments — as she cheered on Jayden, 7, and Sean, 6, from the sidelines.

With one gust of wind, the flimsy dress became an X-rated spectacle at the G-rated family event.

Now the other moms have banded together to let Britney know she needs to cover up!

One irritated onlooker told The ENQUIRER: "We're used to seeing Britney show up to games without a bra, but when she came in a see-though dress without a stitch of underwear on… and the wind was blowing it up so all the kids could see her butt… it's just the last straw.

"How do you explain to a 7-year-old why one of the biggest stars in the world is flashing her bare bottom at a children's soccer game? It's inexcusable."

Pick up the new issue of The ENQUIRER on newsstands for the full story and to see the shocking pix!