Human voice

The human voice consists of sound made by a human being using the vocal folds for talking, singing, laughing, crying, screaming etc. The human voice is specifically a part of human sound production in which the vocal folds (vocal cords) are the primary sound source. Generally speaking, the mechanism for generating the human voice can be subdivided into three parts; the lungs, the vocal folds within the larynx, and the articulators. The lung (the pump) must produce adequate airflow and air pressure to vibrate vocal folds (this air pressure is the fuel of the voice). The vocal folds (vocal cords) are a vibrating valve that chops up the airflow from the lungs into audible pulses that form the laryngeal sound source. The muscles of the larynx adjust the length and tension of the vocal folds to ‘fine-tune’ pitch and tone. The articulators (the parts of the vocal tract above the larynx consisting of tongue, palate, cheek, lips, etc.) articulate and filter the sound emanating from the larynx and to some degree can interact with the laryngeal airflow to strengthen it or weaken it as a sound source.

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Christina Aguilera

Christina María Aguilera (born December 18, 1980) is an American singer-songwriter and actress. In the early 1990s, she appeared on television series Star Search and The Mickey Mouse Club. In 1998, Aguilera signed with RCA Records and recorded her self-titled debut album, which was released in 1999. The album was a commercial success in the United States, spawning three U.S. Billboard Hot 100 number-one singles—"Genie in a Bottle", "What a Girl Wants", and "Come On Over Baby (All I Want Is You)", and helped Aguilera win the Grammy Award for Best New Artist. In 2000, RCA released Aguilera's Spanish-language album Mi Reflejo and holiday-theme album My Kind of Christmas. Her 2002 fourth studio album, Stripped, ventured into various genres including hip hop, Latin, and rock, and won a Grammy Award for Best Female Pop Vocal Performance for its second single "Beautiful".

Aguilera's 2006 fifth studio album, Back to Basics, was inspired by blues, soul, and jazz music of the 1920s-40s. The album peaked at number one on record charts of thirteen countries and won a Grammy Award for Best Female Pop Vocal Performance for its first single "Ain't No Other Man". In 2010, RCA released Aguilera's electronic-influenced album, Bionic, which failed to match the success of her previous albums; later that year, she starred in the film Burlesque. The following year, Aguilera was featured on Maroon 5's top-ten single "Moves like Jagger" and became an original coach on the U.S. television series The Voice, having since appeared on five of its nine seasons. Her 2012 seventh studio album, Lotus, became the lowest-selling album of her career. However, she later experienced rehabilitated commercial success in 2013, being featured on the top-ten singles "Feel This Moment" and "Say Something", which won a Grammy Award for Best Pop Duo/Group Performance.