X17 is widely known as the go-to paparazzi agency for all-things Britney Spears. It's no secret that Britney's camp is in regular contact with the aggressive photogs, which seem to chronicle her every thong bikini and hair extensions fix.

But things have recently soured between X17 and Britney, says a paparazzi insider — which means Britney's re-signed rep Leslie Sloane Zelnik has been hitting the tabloid turf trying to convince the weeklies not to buy the agency's pictures of Britney with son Jayden (among the clearest and only shots of her second son), that were taken on private property, says a source.

And while some tabloids have backed off, we hear Us Weekly went rushed the gate — and is said to have gone to press with tomorrow's issue with those very photos in a Britney-bashing (cover?) story.

Meanwhile, Janice Min's rush to publish the photos has a second agenda: beating OK!. The photos of Britney and Jayden were sold to the Northern & Shell tabloid by Spears under the pretenses of an exclusive. But with X17's shots, Us will effectively destroy OK!'s scoop.

Whatever fills the pages beside another "Fake News" spread is fine by us.