You might not be awed by the song, but whatever your musical tastes, there is simply no way you can justify claiming her singing to be merely 'mediocre'. The control she has over her voice is technically brilliant. She is, at the absolute least, 'very good', more likely 'excellent', but you can't get away with 'mediocre'.
i'd agree with this but wholy hell some people are carrying on something terrrirble, even people claiming she improved the original music *shudder* last time i heard of people "improving" original music the world ended up with tecno, house, dance, trance and all that other rubbish