Britney Spears could lose custody of her sons, Sean Preston and Jayden James, as early as today, thanks to a "secret" witness that LA attorney Gloria Allred is bringing to court at 8:30 am today in the ongoing custody battle between Britney and Kevin Federline. The judge in the closed hearing case already has a signed declaration from this witness, who's described simply as a man who's had close observation of Brit with her kids. "You may recognize him as we walk into court," Allred told Fox News. "But maybe not. He is not famous. He's just someone who's concerned about the kids." It's speculated that the observations have to do with Britney's drug use in her home and in front of her children.