Question: What Operatic Singing group did Nathan Lane almost become a member of in Encore! Encore!?

Context paragraphs:
Chiaroscuro (music): Chiaroscuro (Italian for "light-dark") is part of bel canto an originally Italian classical singing technique in which a brilliant sound referred to as "squillo" is coupled with a dark timbre called "scuro ", which is often perceived as having great depth or warmth. " Chiaroscuro" is commonly used in opera.  Within operatic singing, especially in Italian, the vowel "Ah" is a perfect example of where "chiaroscuro " can be used.  When singing "Ah" it must have a bright Italian "Ah", while at the same time having depth and space in the tone, achieved through the use of breath and the body.

Encore! Encore!: Encore!  Encore!  is an American sitcom starring Nathan Lane as an opera singer.  On the verge of becoming "The Fourth Tenor", Lane's character injures his vocal cords and must move in with his family, who run a vineyard in Northern California.  The series premiered on NBC on September 22, 1998.

The Three Tenors: The Three Tenors were a popular operatic singing group during the 1990s and early 2000s, consisting of Spaniards Plácido Domingo and José Carreras and the Italian Luciano Pavarotti.  The trio began their collaboration with a performance at the ancient Baths of Caracalla in Rome, Italy on 7 July 1990, the eve of the 1990 FIFA World Cup Final.  Zubin Mehta conducted the orchestra of Maggio Musicale Fiorentino and the orchestra of Teatro dell'Opera di Roma.  The recording of this debut concert became the best-selling classical album of all time and led to additional performances and live albums.  Around 1.3 billion viewers worldwide watched their second televised performance four years later at Dodger Stadium in Los Angeles.  They last performed together at an arena in Columbus, Ohio on 28 September 2003.

British slang: British slang is English language slang used and originating in the United Kingdom and also used to a limited extent in Anglophone countries such as the Republic of Ireland, South Africa, the United States, Australia, Canada, and New Zealand, especially by British expats.  Slang is informal language sometimes peculiar to a particular social class or group and its use in Britain dates back to before the 16th century.  The language of slang, in common with the English language, is changing all the time; new words and phrases are being added and some are used so frequently by so many, they almost become mainstream.

Chief Phil Lane Jr.: Chief Phil Lane Jr. (Philip Nathan Lane Jr.) (born 1944) is a traditionally recognized Hereditary Chief and Elder.  He is an enrolled member of the Ihanktonwan Dakota and Chickasaw Nations, and is a citizen of both Canada and the United States.  With master's degrees in Education at National University and Public Administration at the University of Washington, Chief Phil Lane Jr. is an internationally recognized indigenous leader in human and community development.  The founder and chairman of the Four World's International Institute (FWII), an organization dedicated to "unifying the human family through the Fourth Way", Chief Phil Lane Jr. is the recipient of many awards, including the John Denver Windstar Award, and is a frequent speaker on behalf of indigenous rights and wisdom.

Operatic pop: Operatic pop or popera is a subgenre of pop music that is performed in an operatic singing style or a song, theme or motif from classical music stylized as pop.  According to music historians, operatic pop songs became most prevalent with the rise of Tin Pan Alley musicians during the early 1900s.  One influence was the large influx of Italian immigrants to the United States who popularized singers such as Enrico Caruso and inspired the creation of "novelty songs" using Italian dialect.  The songs often used operatic repertory "to make a satirical or topical point".  Popularized by American Vaudeville, musical comedies, jazz and operettas, examples include Irving Berlin's "That Opera Rag", Billy Murray's "My Cousin Caruso" and Louis Armstrong's riffs on "Rigoletto" and "Pagliacci".  The subgenre subsequently dwindled after the 1920s but revived during the rock music era with albums such as The Who's "Tommy" and Queen's "A Night at The Opera".

Jennifer Paige Chambers: Jennifer Paige Chambers is a musical theatre performer, who has appeared in "The Producers" on Broadway with Nathan Lane and Matthew Broderick, in Los Angeles with Martin Short and Jason Alexander, and in the National Tour with Louis Stadlen and Don Stephenson.  She had the chance to co-star as the Swedish secretary, Ulla, with Nathan Lane and Matthew Broderick.

Encore (Clark Sisters album): Encore: The Best of The Clark Sisters is a greatest hits collection by seminal gospel singing group The Clark Sisters to be released on February 12, 2008 through Dexterity Sounds/Rhino Entertainment.

Nathan Lane: Nathan Lane (born Joseph Lane; February 3, 1956) is an American actor and writer.  He is known for his roles as Albert in "The Birdcage", Max Bialystock in the musical "The Producers", Ernie Smuntz in "MouseHunt", Nathan Detroit in "Guys and Dolls", Pseudolus in "A Funny Thing Happened on the Way to the Forum", his voice work in "The Lion King" as Timon and "Stuart Little" as Snowbell, and his recurring roles on "Modern Family", "The Good Wife", and "" as F. Lee Bailey.  In 2006, Lane received a star on the Hollywood Walk of Fame, and in 2008, he was inducted into the American Theatre Hall of Fame.

Timon and Pumbaa: Timon and Pumbaa are an animated meerkat and warthog duo introduced in Disney's 1994 animated film "The Lion King".  Timon was portrayed through his many appearances by Nathan Lane (in all three films and early episodes of the show), Max Casella (the original actor in "The Lion King" Broadway musical), Kevin Schon (in certain episodes of the show), Quinton Flynn (in certain episodes of the show), Bruce Lanoil in the "Wild About Safety" shorts and "Kingdom Hearts II", and while Pumbaa is voiced by Ernie Sabella (in all of his animated speaking appearances), and was portrayed by Tom Alan Robbins in the original cast of the Broadway musical.  In the upcoming live-action remake, the characters will be portrayed by Billy Eichner and Seth Rogen respectively.  Nathan Lane and Ernie Sabella first came to audition for the roles of the hyenas, but when the producers saw how well they worked together they decided to cast them as Timon and Pumbaa.  Lyricist Tim Rice however was pulling for Rik Mayall (for Timon) and Adrian Edmondson (for Pumbaa) to play the roles, as he got the idea for the lyrics to "Hakuna Matata" by watching their show "Bottom".

Supporting paragraphs: Encore! Encore! The Three Tenors
Answer: The Three Tenors