Unless, of course, this was all part of the publicity machine. My inner skeptic believes that this just might be the case. Why is that? Quite simply, I believe that she had reached the zenith of her talent, heck, she sang with The Queen of Country herself, Dolly Parton, and saw little or no increase in sales because of it.
About a year ago Miley did a series of back-to-basics 'Backyard Sessions' which were very well received by critics and the public alike, but again, sales were not good and she just came across as someone from another era.
So what is a young girl to do? She needs to sell albums - which is probably harder than ever now that everyone (ahem) downloads music, especially singles, off the interwebz. She has to make a name for herself, and quick so sadly, a-twerking she must go!
We can look at Miley's latest work 'wrecking ball' and see just how amazing her talent is, and once she calms down in her videos, stops being naked and licking sledgehammers, she'll have yet another middle aged, overweight geek following her (from a distance, not stalking her!~)
To add to all the publicity, Skinhead O'Connor has written Miley a letter asking her to stop prostituting herself for the sake of 'The Man'. So that'll give her something to think about.