The scandal surrounding British soccer stud David Beckham's alleged infidelity is getting personal — and we mean personal. Beckham's former assistant, Rebecca Loos, says she can prove she had an affair with Posh Spice's hubby — and she'll do just that if the issue goes to court. "There's something I know about him," she says, "an intimate part of his body that I think only women who have been in bed with him would know." (Insert requisite Bend It like Beckham joke here.)