One day after leaving New York City with her two children on a Miami-bound private jet (and many, many weeks after painting this, that and every town red), Britney Spears has checked into a rehab facility, TV's Extra is reporting. Officially, Britney's reps tell the newsmag that they have "no comment."

Sounds like someone finally picked up a newspaper and read about Anna Nicole.

Or not. UPDATE: TMZ has learned that Brit refused to stay at the out-of-the-country rehab center, and now, less than 24 hours later, is en route back to Los Angeles.

UPDATE: She's now bald.