K-Fed the Cause for the Bald Head?

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The TV show The Insider is stating that rumor has it that Britney shaved her head because K-Fed was going to have her hair tested for drugs in order to win his child custody case. They also say that K-fed's representatives claim that this is totally false. Not sure if they are speaking the truth. Brit also checked in to rehab again today. I think maybe this story may have some truth to it. What do you all think?