Vocal range is the measure of the breadth of pitches that a human voice can phonate. Although the study of vocal range has little practical application in terms of speech, it is a topic of study within linguistics, phonetics, and speech and language pathology, particularly in relation to the study of tonal languages and certain types of vocal disorders. However, the most common application of the term "vocal range" is within the context of singing, where it is used as one of the major defining characteristics for classifying singing voices into groups known as voice types.

While the broadest definition of vocal range is simply the span from the lowest to the highest note a particular voice can produce, this broad definition is often not what is meant when "vocal range" is discussed in the context of singing. Vocal pedagogists tend to define the vocal range as the total span of "musically useful" pitches that a singer can produce. This is because some of the notes a voice can produce may not be considered usable by the singer within performance for various reasons. For example, within opera all singers must project over an orchestra without the aid of a microphone. An opera singer would therefore only be able to include the notes that they are able to adequately project over an orchestra within his or her vocal range. In contrast, a pop artist could include notes that could be heard with the aid of a microphone.

Mariah Carey (born March 27, 1970) is an American singer, songwriter, record producer, and actress. She made her recording debut in 1990 under the guidance of Columbia Records executive Tommy Mottola, and released her self-titled debut studio album, Mariah Carey. The album went multi-platinum and spawned four consecutive number one singles, on the U.S. Billboard Hot 100 chart. Following her marriage to Mottola in 1993, a series of hit records, including Emotions (1991), Music Box (1993) and Merry Christmas (1994), established her position as Columbia's highest-selling act. Daydream (1995), made music history when the second single, "One Sweet Day" a duet with Boyz II Men, spent a record sixteen weeks on top of the Billboard Hot 100, and remains the longest running number one song in US chart history. During the recording of the album Carey began to deviate from her pop background, and slowly traversed into R&B and Hip-hop. After her separation from Mottola, this musical change was evident with the release of Butterfly (1997).

Michael Bolotin (born February 26, 1953), better known as Michael Bolton, is an American singer and songwriter. Bolton originally performed in the hard rock and heavy metal genres from the mid-1970s to the mid-1980s, both on his early solo albums and those recorded as the frontman of the band Blackjack. He is best known, however, for his series of soft rock ballads, recorded after a stylistic change in the late 1980s. He is noted for his distinctive tenor/countertenor vocals.

Bolton's achievements include selling eight top 10 albums, achieving two number one singles on the Billboard charts, and receiving awards from both the American Music Awards and Grammy Awards.

Bolton was born Michael Bolotin in New Haven, Connecticut, the son of Helen (Gubin) and George Bolotin. He has a brother, Orrin, and a sister, Sandra, both older. His family was Jewish, and all of his grandparents had been immigrants from Russia. His parents were divorced when he was very young and his father died when Michael was 13 years old.

Tamar Braxton-Herbert (pronounced Tay-mar) (born March 17, 1977) still commonly known as Tamar Braxton is an American R&B singer, songwriter, and reality television personality. She rose to fame in the 1990s as a founding member of the R&B group, The Braxtons. Braxton is the youngest sister of prominent R&B singer Toni Braxton.

In 2011, Tamar Braxton reunited with her sisters, The Braxtons, for the WE tv reality show, Braxton Family Values. The first season was the #1 rated reality show on WE tv and the network ordered a 13-episode second season of the show after the third episode.

Tamar Estine Braxton was born in Severn, Maryland to Michael and Evelyn Braxton. The youngest of the Braxton's six children, Tamar started singing as a toddler. Evelyn, an amateur opera singer, recognized her children's talents when one day, Tamar sang "Can you please get me some toilet paper!" Evelyn began training her girls. The Braxton children also would eventually enter in their church choir, where Michael Braxton was pastor.

Diana Damrau (born 31 May 1971 in Günzburg, Bavaria) is a German soprano opera singer.

Diana Damrau was born in 1971 in Günzburg, Bavaria, Germany, and began her operatic studies with Carmen Hanganu at the Musikhochschule in Würzburg. After graduating from music conservatory she worked in Salzburg with Hanna Ludwig. Her first operatic engagements were in Würzburg and subsequently the National Theatre Mannheim and Oper Frankfurt. Since then, she has sung throughout the world at venues such as the Vienna State Opera, the Metropolitan Opera New York, the Royal Opera House, the Bavarian State Opera and the Salzburg Festival. She was invited to sing the title role in Antonio Salieri's Europa riconosciuta at the re-opening of La Scala, Milan in 2004, under the baton of Riccardo Muti.

The Queen of the Night from Mozart's The Magic Flute has been Damrau's most frequently performed role to date, as she has been engaged to perform it in over 15 productions at houses including Covent Garden, the Salzburg Festival, the Vienna State Opera, Oper Frankfurt and the Bavarian State Opera, Munich. Damrau made Metropolitan Opera history in the 2007/2008 season by appearing as both Pamina and Queen of the Night in the same run, but different performances. Other coloratura roles in her repertoire include Zerbinetta, Lucia, Elvira, Rosina, Gilda, Adina, Marie and Aminta. She also performs roles in the lyric repertoire including Manon, Donna Anna, Gretel and Pamina.