Miley Cyrus has her dad write all her songs.. She's just living her dad's life and apparently that inspired a bunch of 7 year old girls to become premadonna nuisances.
I don't really have an opinion...The worst singer I've ever heard out of the music that I listen to is probably the guy from Taking Back Sunday...He's horrible live, no matter how good the songs on the album sound.
Something makes me want to say Miley Cyrus, just for the sake of bashing on tween culture. But, then again, I've never actually listened to her music, so I won't judge.