Sophia Bush refused to believe Britney Spears' ex-husband KEVIN FEDERLINE had landed a role on her TV show One Tree Hill - because producers kept his casting a secret. Bush and her One Tree Hill co-stars found out Federline had won a regular spot on the show when they read about it online. But they dismissed the reports of Federline's casting as groundless speculation. Bush recalls, "We're looking up blogs, going, `Have you seen this?' And we're going, `That's not real! We would know if he was coming.' "And then our creators were like, `No, he's really coming.'"