Britney Spears is busy traveling the U.S. in search of singers who have "The X Factor," but one rejected contestant (and former Spears backup singer) isn't handling his dismissal from the show all that well, releasing a previously unheard Spears demo and hitting out at the singer on Facebook.

Singer Don Philip released the track, originally titled "Pleasure You," on Wednesday on his SoundCloud. The singer — who duetted with Spears on the ballad "I Will Still Love You" off her debut album, ... Baby One More Time — also appears on "Pleasure You." Digital Spy reports that the dance track is believed to be from a 2010 studio session for Spears' most recent album, the well-received Femme Fatale.

Philip recently had an emotional reunion with Spears while auditioning for "X Factor" in San Francisco. The pop star reportedly recognized her former collaborator immediately and became emotional when Philip began crying onstage after what he has himself since admitted was a weak audition. She remained professional, however, and sided with her fellow judges in removing Philip from the competition.

He later took to his Facebook to explain why his audition went so poorly, and he also took a shot at Spears in the process. "Back to real life ... all my demons released ... I totally crocked when the pressure was on ... at least I didn't shave my head," he wrote. "My vocal [cords] tightened up like a snake around a mouse."

It is unclear whether Philip's vocal originally appeared on the "Pleasure You" demo or whether it was added later without Spears' knowledge.

The pop star has reportedly settled into her role as judge on "The X Factor" quite nicely. Talking to a paparazzi cameraman in Los Angeles in June, Simon Cowell said of Spears, "She's been amazing. She's really taking time to learn how to do this. She's got her confidence up. Once people give her a chance, I think people are really going to get her. It will be a big surprise. She's a tough judge."

"The X Factor" returns to Fox on September 12.