And we're not talking about her old hit single, "Crazy."
This three-minute clip isn't new, but it's worth a viewing nonetheless. Fans may recall this surfacing nine months ago, when Britney Spears was still married to Kevin Federline.
Here, FedEx films Britney, decked out in classic white trash trucker garb, babbling incoherently, probably high on something, snacking feverishly and waxing philosophical about the human condition, partying and other stuff.
It's quite something, really. What a loon. Some of our conclusions after watching this simultaneously terrifying and hysterical video of Britney Spears: