I love how, of all the times you've irrationally displayed your dislike for Nirvana (to an audience that couldn't care less), you've never even once bothered to explain your reasoning, assuming you have any. I guess it's to be expected.
Anyway, I dislike them both for different reasons. The Jonas Brothers make horrible music, and get praised for talent that they don't have, but I wouldn't be surprised if they hate their own music. Then again, they have compared themselves to The Beatles.
Miley Cyrus is a spoiled brat, who also makes horrible music.