Sorry Miley. While you may have popularised twerking to the extent that you've become famous for it, you can't claim to be the originator - the word "twerk" (with the variant spelling "twirk") seems to have been in use since 1820. Somehow I can't imagine Queen Victoria approving of the practice.
This revelation means that "twerk" isn't so much an entirely new addition to the Oxford English Dictionary as a term that has been rightly reinstated after a period of absence. Also now included in the dictionary are "meh" and "Twitterati". Given that, "for a word to qualify, it must have been in popular use for at least 10 years in both novels and newspapers", those two additions seem rather odd - "meh" has been in circulation for a lot longer, whereas (as a friend has pointed out) surely "Twitterati" can't be ten years old yet?