First of all we know that Kirk would screw anything in the universe including miley. He would just cover his ears and go where plenty of men have went before.
On that note Miley is not my cup of tea but she is not an awful singer. Not a great one either. It's Mileys antics and image that make us gag. The rest of the miley hate is typically from those that just hate modern pop music in general. Comparing her to guy who seems incabale of carrying a tune is funny but no contest.