Kelly rowland- Vocal Profile/ Range

Kelly Rowland

Vocal Type: Mezzo-Soprano
Vocal Range:3 octaves  C3- C6
Vocal Pluses: Her voice really shines in its strong, weighty midrange belt that can be made to sound even more impressive with the application of her vibrato. She is also able to execute complex vocal runs.
Vocal Negatives: Weaker low range that is reached via bad technique. The upper extremities of the chest register can sometimes sound harsh,  rough and unpolished.

Lea Michele (Rachel from Glee) - Vocal Profile/ Range

Lea Michele

Vocal Type:Soprano

Vocal Range:2 Octaves 1 notes and a semitone F#3-A5

Vocal Pluses:Technical singer with a good grasp of her voice as a whole, thus the sound it produces is always supported well. Her chest voice is crystal clear and has great dynamics, with the higher belted notes being reached through the aid of mixing with the head voice. Her intonation and delivery is also brilliant meaning her voice can effectively communicate a song's emotion and sentiment without sacrificing the audibility of the lyrics.

Vocal Negatives:Her vocal styling means that the vast majority of her performances have a theatrical feel to them, suggesting a limitation to the genres she can sing. Also her chest register can sometimes sound overbearingly strong/piercing, especially when the notes aren't softened with vibrato.

Cheryl Cole - Vocal Profile/Range

Cheryl Cole

Vocal Type: Mezzo- Soprano
Vocal Range: 1.7 octaves (Approx). F3- Eb5

Vocal Pluses:Voice has a pleasant soft quality in the head and mid range.

Vocal Negatives: weak voice that lacks strength or dexterity with a tendency to become thin and whiny as it progresses up the chest voice.

[ Vocal Profile] Lady GaGa

Lady GaGa

Vocal Type: Mezzo-Soprano
Whistle Register: No
Vocal Range: 2.7 octaves (C3-B5 approx)
Vocal Pluses: Powerful, passionate,  multifaceted voice. Not only is it an expressive and well controlled instrument, but it's one that doesn't weigh on melisma to impress (though she is capable of using this vocal technique if required [Do What U Want] ). With her excellent breath control and knowledge, the Diva can hold notes [Fashion], jump octaves [Venus], and play with vocal dynamics at will [Bewitched, Bothered And Bewildered].

Lady Gaga's low notes are well supported, and have a dark, solid and medium weight to them [Scheiße]. The mid-range is as chameleonesque as Gaga herself. It can be controlled, measured and mature [Fashion]; theatrical, poised and smooth [Lady Is A Tramp]; guttural, raw and raspy [ Dope]; or made perfect for pop music with the character stripped back, and a light, bright quality used  [Poker Face]. All this vocal variety stems from Gaga's excellent understanding of placement and technique.

Jennifer Hudson - Vocal Profile/ Range

Jennifer Hudson

Vocal Type: Mezzo Soprano
Whistle Register: No
Vocal Range: C3-C#6 (3 octaves and a semitone)
Vocal Pluses: An impressive voice that is grounded in the gospel style. Hudson has the ability to hold notes for extended periods of time, without issue or strain, and is even able to do so in the upper extremes of her belting range (Hear: Everybody Needs Love (2.46).

Dark and rich in timbre and tone, the voice has an impressive weight to it (Hear: Where You At). Her midrange is rounded, solid and well connected to the the lower and upper range.

Hudsons' belting range is the strongest part of her voice, in large part due to her excellent mix. Elastic, powerful and with a good dynamic, it remains impressively resonant at higher frequencies( E5-B5).

Vocal Negatives: Under utilised head voice.

Aretha Franklin - Vocal Profile/ Range

Aretha Franklin

Vocal Type: Mezzo-soprano
Whistle Register: No
Vocal Range: 3.5 G2- E6 (approx)
Longest Note: 5 seconds ("old landmark")
Vocal Pluses: Powerful, passionate voice, which is grounded in the Gospel tradition. Both a technical and an emotive singer, Aretha Franklin is able to sing complex vocal runs, that can span the top of her range right down to the bottom, as well as hold notes for lengths of time with ease.

Aretha Franklin has a well connected range, that appears to sound easily accessible both at the top and the bottom. The lower range is thick and weighty with a dark colouring and a slightly smoky timbre. The midrange begins to become more nasal, and lighter as it ascends into the belting range.

The belting range is incredibly elastic and powerful, having been known to hit a D6 when mixed with its head voice [listen here]. This part of the range is characterful and easily attributable to Aretha Franklin, due in part to its quick vibrato and nasal tone. Though her voice becomes lighter as its frequency increases, it still retains its resonance and power up into its top reaches. Her flexibility and ease in this part of the range is almost unparalleled.

Vocal Negatives: The voice has become more nasal as she has aged which has lessened the power, and quality of the higher notes.

Nina Hagen- Vocal Profile/ Range

Nina Hagen

Vocal Type: Soprano
Whistle Register: Yes
Vocal Range:3.1 Octaves. D3- F6 (approx)
Longest Note: 11 seconds
Vocal Pluses: Glorious soprano highs and amazing tenor like lows and a voice that is able to scream in a rock wail or be soft as any balladeer. Versatility is key to defining the voice of this lady. I would be very surprised if she is not classically trained.
Vocal Negatives: Nina's flexibility may not be to everyone's taste and it's likely the extreme way she uses her voice will turn many listeners off.

Whitney Houston - Vocal Profile/ Range

Whitney Houston

Vocal Type Mezzo Soprano
Vocal Range: 3.2 Octaves. A2- C6 (approx)
Whistle Register: No
Longest Note: 16 seconds - Greatest Love Of All (Live)
Vocal Pluses: The timbre of Whitney Houston's voice is her crowning glory: thick, luscious and velvety. Her midrange is where the voice finds its strength, and she is famed for her powerful, dark and emotive belting at the top part of this range. The higher chest notes, past a C5, lose power and weight as they ascend higher and are mixed with the head voice, but they still retain a notable, and identifiable, character. The head voice, on its own, is thick, warm, and slightly smoky with a resonance that mirrors that of her midrange belting voice. Whitney is able to switch to this part of her voice with apparent ease.

Whitney Houston is famed for having brought melisma/vocal runs to the masses, and as such, it is no surprise that her voice is able to execute incredibly fast, and complex runs with pinpoint accuracy. She also has the stamina to hold notes- see I Will always love you- for lengths of time without wavering in pitch. Notes can also be coloured with the use of her impressive vibrato, which she can modify the speed of to dramatic effect by quivering her lip. Her trademark vibrato, along with the midrange belt and thick head voice, is one of the iconic aspects of her remarkable voice.

Vocal Negatives: Whitney Houston's voice can become shrill in the upper range, especially when attempting to belt the higher fifth octave notes.

Sarah McLachlan - Vocal Profile

Sarah McLachlan

Vocal Type: Mezzo Soprano
Vocal Range: 2.4 Octaves. F3- B5 (approx)
Longest Note: 9 seconds - 'Icecream' (live)
Vocal Pluses: Good control and nice timbre
Vocal Negatives: Tendency to yodel

Mary J Blige - Vocal Profile/ Range

Mary J Blige

Vocal Type: Mezzo-soprano (voice has deepened with age)
Range: 3 octaves. 2 notes A2- C6
Longest Note: 12 seconds .
Vocal Pluses: Soulful voice that has a unique, husky texture. Has a solid midrange, that has a dark, weighty timbre and a lighter chest range that is able to mix well to belt higher into the fifth octave. Dexterous voice that is capable of complex melisma, as well as the stamina to be able to hold sustained notes. Able to use the voice to convey the emotions of the song exceptionally. 
Vocal Negatives: Voice sometimes sounds strained

[Vocal Profile] Christina Aguilera

Christina Aguilera

Vocal Type: Mezzo- Soprano
Vocal Range: 4 octaves. C3- C7
Whistle Register:Yes
Longest Note: 20 seconds - 'At last' (live)
Vocal Pluses: Christina Aguilera is in possession of a nimble and dexterous voice that is most known for its intricate melisma, slides and edgy belts. The Diva is able to jump between the different parts of her range with ease and swiftness, while possessing the stamina and breath control to sustain notes for extended periods of time [At Last (live)]. Holding these notes, she often forgoes any vibrato [Ain't No Other Man / Let There Be Love]. But when she does choose to add it, she favours a non-traditional, stop/start technique and a seesawing jaw to create the effect. It's a choice that results in a wider vibrato than some of her contemporaries.