Not much of a Dr. Phil fan here, either, Megan. Seems to do a tad too much pill-hawking and book-pushing for my taste, too. His show is bordering on Springeresque these days, and now this whole Britney intervention... it's nuts.
She may indeed be bipolar. From what I understand, the post-partum period can be a trigger for this illness, and her troubles definitely seemed to have started after she gave birth to Sean Preston.
Isn't there anyone out there who exercises any control over this girl whatsoever? She needs to be in therapy ASAP!