…but unfortunately for the ex-Mr. Spears, it's not a chart-topping "Popazao": Entertainment Tonight is reporting that the FBI and LAPD are "investigating legitimate leads" on a reported contract hit on Kevin Federline's life, with the FBI making repeated attempts to contact America's favorite divorcee to warn him of the potential dangers. While the most obvious suspect might be looking to help ease the burden on poor Britney by settling a nasty custody battle out of court, when it comes to playing "Who hates Kevin Federline?" the blood is on pretty much everybody's hands. Anybody want to fess up?