Vocal Range: 3 octaves and 2 notes and a semi tone C#3- F6
Whistle Register: Yes
Vocal Pluses: Jessie J has the ability to sing complex melisma without issue, and this is often noted as being a signature of her style. Along with this ability, she has the control to be able to sing trills, staccato notes and staccatissimo through complex melodies with pinpoint accuracy and uncanny pitch.
Jessie J's control, in regards to her vocal dexterity, is mirrored in her breath control.As a result she can hold notes for lengths of time without loss of quality to the sound , and sing complex and lengthy vocal lines in a single breath.
Strong mid-range that is solid, rounded, has a good dynamic to it and leads into the belting range effortlessly. The belting range is elastic and energetic, being able to reach high into the fifth octave, with the aid of mixing. The head voice alone is spritely, of medium weight and is bright and easily accessible.
Vocal Negatives: Her technique sounds improper when reaching above an E5 and as a result her voice becomes shrill and unstable.