So, of course, there has been a lot of media coverage about Britney shaving her own hair off, and now going into rehab.

The broadly accepted view is that this is some kind of cry for help, but I have another theory.

One of the lesser known things about hair is that it can be used to do drug tests. As hair grows out, chemicals in your system get into the hair, so if the hair is long enough, you get this historical record of all the drugs someone has taken.

Why would she care? Of course, she's not saying, but I wouldn't be surprised if it didn't come down to K-Fed threatening to bring up past drug use in the custody battle over their children.

Of course, this plan may backfire, given that the hair salon is trying to sell the hair for $1M on eBay. Of course, Britney isn't know for her brains. How ironic if she had to buy back her own hair for a million bucks to keep (in her mind) custody of her kids, when she could have bought a hair clipper kit at Target for $15.