Vocal Type: Mezzo- Soprano
Vocal Range: 3 octaves 2 notes G2- B5 (approx)
Longest Note: 17 seconds (Ray of Light at Live Earth)
Vocal Pluses: Adapts her vocal style to the music she's singing well. The middle of her range is her strongest suit: it's solid, with a warm colouring and a clear timbre. Her chest voice is bright and sharp. While her head voice can be either soft and delicate, or direct and solid.
Vocal Negatives: Voice becomes thin and nasal, very quickly, as it gets higher up and into the chest range.
Until I have time to do my own research I'll post the video below. However, I'm not inclined to agree with a lot of the notes- you can, if you so chose to.