Heinous hair

ok, this is actually megan's fault that i'm even thinking about britney spears right now. so she shaved her head in early feb of last year. so her hair has been growing (if it grows the same as everyone else's), an average of 1/2 inch per month. so her hair should have grown 6 inches by now, more probably. my question is....What the fuck is she still wearing nasty hair extentions with the weave showing? her hair should be grown out by now atleast paris hilton's length. i mean i know the answer is simple: she's mentally incapable of thinking like a normal person. but aren't extentions like way more work than real hair?