"Before we begin our consideration of Britney the songwriter, there are two side-issues we need to address. One – can a singer only be regarded as an “artist” if he or she writes his or her own material? Two – is it even true that Britney writes less of her own material than many other comparable superstars?"
FIY I didn't write this. I don't go around spamming. This is a very interesting article written by a British woman called Karen, who has spent many, many years of her life writing about Britney in the most documented way possible. So if you're a fan you should at least try and read it.