A judge threw out a libel suit brought by Britney Spears against Us Weekly for allegedly fabricating a story about some homemade porn cooked up by the pop princess and her deadbeat husband, Kevin Federline.

The judge's reasoning? Essentially, Britney Spears slutted it up long ago, thereby relinquishing any right to claim sexually-charged rumors about her are false.

And when you think back to some of the classic Britney Spears pictures such as the one shown here, it's hard to argue with that logic. Not that we're complaining, of course.

In tossing out the suit, Los Angeles Superior Court Judge Lisa Hart Cole ruled that the article wasn't defamatory because Spears had, in her music videos and boring reality TV series, "put her modern sexuality squarely, and profitably, before the public eye."

Thus, it would be unlikely for the magazine article to be found defamatory, even if it lied and said she and Kevin recorded a sex tape.

The Us article said that the couple was concerned about a sex tape getting leaked, and that they'd watched the tape with her lawyers, with Britney allegedly acting "goofy" during the viewing, a detail that K-Fed's better (goofier?) half objected vigorously to in the original suit.

"It is clear that plaintiff did not bring this lawsuit because she was falsely accused of acting goofy," wrote Hart Cole.

Wow. If Jayden James Federline could see this... he'd probably spit up and cry. That's what babies do on occasion.