The tenor is a type of male singing voice and is the highest male voice within the modal register. The typical tenor voice lies between C₃, the C one octave below middle C, to the A above middle C (A₄) in choral music, and up to tenor C (C₅) in solo work. The low extreme for tenors is roughly B♭2 (two B♭s below middle C). At the highest extreme, some tenors can sing up to two Fs above middle C (F₅).

The term tenor is also applied to instruments, such as the tenor saxophone, to indicate their range in relation to other instruments of the same group.

Within opera, the lowest note in the standard tenor repertoire is A₂ (Mime, Herod), but few roles fall below C₃. The high extreme: a few tenor roles in the standard repertoire call for a "tenor C" (C₅, one octave above middle C). Some (if not all) of the few top Cs in the standard operatic repertoire are either optional (such as in "Che gelida manina" in Puccini's La bohème) or interpolated (added) by tradition (such as in "Di quella pira" from Verdi's Il trovatore). Some operatic roles for tenor require a darker timbre and fewer high notes. In the leggero repertoire the highest note is an F₅ (Arturo in "Credeasi, misera" from Bellini's I puritani), therefore, very few tenors can have this role in their repertoire. A shift in pitch since the mid 19th century means that the few written top Cs (such as in "Salut demeure" from Gounod's Faust) would have in fact demanded a note at least a semitone lower than today's standard pitch.

Céline Marie Claudette Dion, CC OQ, (French pronunciation: [selin djɔ̃] ( listen); born March 30, 1968), is a Canadian singer. Born to a large family from Charlemagne, Quebec, Dion emerged as a teen star in the French-speaking world after her manager and future husband René Angélil mortgaged his home to finance her first record. In 1990, she released the English-language album Unison, establishing herself as a viable pop artist in North America and other English-speaking areas of the world.

Dion had first gained international recognition in the 1980s by winning both the 1982 Yamaha World Popular Song Festival and the 1988 Eurovision Song Contest. Following a series of French albums in the early 1980s, she signed on to CBS Records Canada in 1986. During the 1990s, with the help of Angélil, she achieved worldwide fame after signing with Epic Records and releasing several English albums along with additional French albums, becoming one of the most successful artists in pop music history. However, in 1999 at the height of her success, Dion announced a hiatus from entertainment in order to start a family and spend time with her husband, who had been diagnosed with cancer. She returned to the top of pop music in 2002 and signed a three-year (later extended to almost five years) contract to perform nightly in a five-star theatrical show at the Colosseum at Caesars Palace, Paradise, Nevada.