Question: What subgenre of pop is Italian trio II Volo famous for?

Context articles: Il Volo (album)
If I Can Dream (album)
Volo Auto Museum
Vino Volo
Il Volo discography
The Complete Trio Collection
Operatic pop
Il Volo Takes Flight
Italy in the Eurovision Song Contest 2015
Constantemente Mía

Il Volo is the self-titled debut album from the pop-opera trio Il Volo, formed on the Italian singing competition "Ti lascio una canzone".
 The album, produced by Humberto Gatica and Italian singer-producer Tony Renis, was released in Italy on November 30, 2010 and in the United States on May 17, 2011.
 It reached the top spot in the Austrian Albums Chart and it was certified Platinum in Italy by the Federation of the Italian Music Industry.
 The Spanish edition of the album received a nomination for Best Pop Album by a Duo or Group with Vocals at the 12th Latin Grammy Awards in 2011.
If I Can Dream is a compilation album by American singer Elvis Presley (1935–77).
 It was released on October 30, 2015 by RCA Records and Legacy Recordings.
 The album features archival vocal recordings of Elvis accompanied by new orchestral arrangements by the Royal Philharmonic Orchestra.
 It also features duets with Canadian singer Michael Bublé and Italian trio Il Volo.
 "If I Can Dream" was recorded at Abbey Road Studios in London, England, and it was produced by Nick Patrick and Don Reedman.
Established in 1960 by the Grams family, the Volo Auto Museum is an automobile museum and collector car dealer in the Chicago suburb of Volo, Illinois, USA.
 The museum contains an exhibit of collectors' autos from vintage to modern classics, with the main focus being American cars of the 1950–1980 period, TV and movie cars, bizarre cars, cars previously owned by the rich and famous, and a large, one-of-a-kind, Disney and Looney Tunes characters display.
 Unique to this museum is that many of the vehicles on display (in five large buildings) are for sale.
 One of 33 exhibits on the 25-acre museum campus is a military-oriented "Armed Forces Exhibit," added in the late 2000s.
 Of the 4 antique malls on the museum grounds, one is reported to be haunted and has become a magnet for ghost hunters and sightings and an episode of the TV show Ghost Lab.
 The museum has its own TV series on History called "Volo, House of Cars" beginning in 2017.
Vino Volo (Italian for "wine flight") is a food and wine bar with a boutique wine shop.
 A San Francisco-based company, Vino Volo was founded in 2004 by Doug Tomlinson.
 Vino Volo sells wines from around the world by the bottle, glass, or in tasting flights. Additionally, they sell a variety of food options to eat at the store, or "to go".
 Vino Volo offers a wine club for enthusiasts and a loyalty program to rewards its guests.
This article is the discography of Italian popera trio Il Volo and includes all the studio albums, live albums, EPs, and singles, as well as the peak chart positions for Italy, Argentina, Austria, Belgium (Wallonia), France, Germany, Mexico, Netherlands, New Zealand, Switzerland and United States ("Billboard" 200, "Classical Albums", "Top Latin Albums" and "Latin Pop Albums" for the albums and "Classical Digital Songs" and "World Digital Songs" for the singles).
 Furthermore, there are certifications from FIMI, CAPIF, IFPI Austria, SNEP, AMPROFON, RMNZ and RIAA, with relative sales figure.
The Complete Trio Collection is compilation album by American singer-songwriters Dolly Parton, Emmylou Harris and Linda Ronstadt.
 It brings together newly remastered versions of their two award-winning albums, 1987's "Trio" and 1999's "Trio II", with a third disc compiling 20 alternate takes and unreleased material.
 It was released worldwide on September 9, 2016, by Rhino Entertainment.
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".
Il Volo... Takes Flight: Live from the Detroit Opera House is the first live album by Italian operatic pop trio Il Volo.
 The album was recorded during one their first North American shows.
 It includes eight tracks from their debut album, "Il Volo".
Italy participated in the Eurovision Song Contest 2015 with the song "Grande amore", written by Ciro Esposito and Francesco Boccia.
 The song was performed by the male operatic pop trio Il Volo.
 Italian broadcaster RAI announced in September 2014 that the winning performer(s) of the Sanremo Music Festival 2015 would have the right to represent the nation at the Eurovision Song Contest in Vienna, Austria.
 The selected performer would also be given the right to choose their own song to compete with at Eurovision.
 In February 2015, Il Volo emerged as the winners of Sanremo with the song "Grande amore".
 The trio accepted the invitation to represent Italy at Eurovision and decided that "Grande amore" would be their contest entry.
"Constantemente Mía" (English: "Constantly Mine") is the first single by the Italian trio Il Volo, with the Mexican singer Belinda, from their studio album "Más Que Amor".