Why did Minnie Pearl have a price tag hanging from her hat?

Minnie once said that "The price tag on my hat seems to be symbolic of all human frailty.

Her humorous reason was to show that it was a "store boughtin'" hat.

"I dressed ‘Minnie’ the way I thought a girl would look who came to town from the country on a Saturday to do a little tradin’ and a little flirtin’," Colley said. The signature price tag came a couple of years later, the result of a fortuitous oversight. After purchasing dime-store flowers for her hat, Colley forgot to remove the tag. During a performance, she turned her head; the tag spilled over the brim. A perfect gag: the audience loved it.
http://www.smithsonianmagazine.com/issues/2003/march/object.php

Thank you Brainyblonde! That was the answer I was looking for! I had heard it was an oversight that got a laugh so she stuck with it! Love that story!