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.

Joseph Calleja, (born 22 January 1978), is a Maltese tenor. He began singing at the age of 16 and, having been discovered by Paul Asciak, continued his studies with him. At 19, he made his operatic debut as Macduff in Verdi's Macbeth at Astra Theatre in Gozo and went on to become a prize winner at the Belvedere Hans Gabor competition the same year. In 1998 he won the Caruso Competition in Milan and was a prize winner in Plácido Domingo's Operalia International Opera Competition in 1999. He has since been considered one of the most promising young tenors of the 21st century.

In Europe Calleja has performed in many Opera Houses including Royal Opera House in Covent Garden in London, the Vienna Staatsoper, Frankfurt Opera, Deutsche Oper Berlin, Opéra National du Rhin in Strasbourg, Teatre Principal in Majorca, Gran Teatre de Liceu in Barcelona and many more.

In the USA Calleja has performed at the Metropolitan Opera in New York, Houston Grand Opera, Los Angeles Opera, Seattle Opera, Washington National Opera, and the Civic Opera House in Chicago. Calleja has recorded two CDs of opera arias: Tenor Arias and The Golden Voice.

Juan Diego Cuauhtlatoatzin or Juan Diego (1474–May 30, 1548) was, according to Mexican Catholic tradition, an indigenous Mexican who reported a Marian apparition, Our Lady of Guadalupe, in 1531. The apparition has had a significant impact on the spread of the Catholic faith within Mexico. The Roman Catholic Church canonized him in 2002, as its first indigenous American saint.

The reality of Juan Diego's existence has been questioned by a number of experts on the early religious history of New Spain including Bernardino de Sahagun, Joaquin Garcia Icazbalceta, Stafford Poole, Louise Burkhart and David Brading, who argue that there is a complete lack of sources about Juan Diego's existence prior to the publication of the Nican Mopohua a century later, in 1649 (they do not accept the validity of the Codex Escalada as historical evidence). Notwithstanding these doubts, the findings of an interdisciplinary study, by nearly two dozen experts involving a prominent Mexican university and a noted American scholar of pre-Columbian Mesoamerican linguistics and anthropology, all indicated authenticity of the document and 16th century origin.

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.

Luciano Pavarotti, Cavaliere di Gran Croce OMRI (12 October 1935 – 6 September 2007) was an Italian operatic tenor, who also crossed over into popular music, eventually becoming one of the most commercially successful tenors of all time. He made numerous recordings of complete operas and individual arias, and established himself as one of the finest tenors of the 20th century. He was one of The Three Tenors and became well known for his televised concerts and media appearances. Pavarotti was also noted for his charity work on behalf of refugees and the Red Cross, amongst others.

Pavarotti began his professional career as a tenor in 1961 in Italy. That same year, he made his first international appearance in La traviata in Belgrade, Yugoslavia. He sang in opera houses in addition to Italy, in the Netherlands, Vienna, London, Ankara, Budapest and Barcelona. The young tenor earned valuable experience and recognition while touring Australia at the invitation of soprano Joan Sutherland in 1965. He made his United States debut in Miami soon afterwards, also on Sutherland's recommendation. His position as a leading lyric tenor was consolidated in the years between 1966 and 1972, during which time he first appeared at Milan's La Scala and other major European houses. In 1968, he debuted at New York City's Metropolitan Opera as Rodolfo in Puccini's La bohème. At the Met in 1972, in the role of Tonio in Donizetti's La fille du régiment he earned the title "King of the high Cs" when he sang the aria "Ah mes amis ... pour mon âme". He gained worldwide fame for the brilliance and beauty of his tone, especially into the upper register. He was at his best in bel canto operas, pre-Aida Verdi roles and Puccini works such as La bohème, Tosca and Madama Butterfly. The late 1970s and 1980s saw Pavarotti continue to make significant appearances in the world's foremost opera houses.