Without so much as the pluck of an eyebrow (as far as we can tell), Britney Spears has once again entered rehab, according to TMZ. This third try at rehabilitation, set to last 30 to 45 days, has effectively canceled the emergency custody hearing her estranged husband Kevin Federline requested yesterday. Sneaky, although can you blame her? Reentering rehab seems a small price to pay from keeping freaking Kevin Federline from having permanent custody of your kids (he’s had them since last week, it’s reported). Then again, walking naked through a rose garden in a rainstorm of rubbing alcohol would be a small price to pay from keeping freaking Kevin Federline from having full custody of your kids, you know?