 She can belt and she can tease; she can aim a note as directly as a missile or turn its trajectory into an aerobatic spiral of leaping, quivering, scalloping melismas.Her voice is not an instrument for making modest statements; it's about peaks of self-affirmation, indescribable sensual pleasures, steely counterattacks and abysses of sorrow".Aguilera has, however, been criticized for her excessive use of melisma and oversinging on songs and in concerts.