Question: What type of music did this American group consisting of four members, to which Sona Family has been compared, originally perform?

Context articles: RichGirl
Little Big Town
Deka Moni
Furbaz
Sona Family
Cosmo4
GP Wu
The Black Eyed Peas
The Piano Guys
Miami String Quartet

RichGirl was an American R&B vocal girl group consisting of four members: Audra Simmons, Christina "Brave" Williams, Kristal Lyndriette Smith (then known as Lyndriette and now known as Kristal, a member of June's Diary) and Amber "Se7en" Streeter (now known as Sevyn Streeter).
 The group's name refers to "a certain attitude and confidence, combined with individuality and talent that any girl might possess", rather than material items.
 The group was formed with the help of record producer Rich Harrison, and is managed by Tina Davis.
 The group draws inspiration from groups such as Destiny's Child, Spice Girls, SWV, En Vogue, TLC, and artists such as Beyoncé, Toni Braxton, Madonna, Stevie Wonder, Angie Stone, and Michael Jackson.
Little Big Town is an American country music group.
 Founded in 1998, the group has comprised the same four members since its founding: Karen Fairchild, Kimberly Schlapman (formerly Kimberly Roads), Jimi Westbrook, and Phillip Sweet.
 Their musical style relies heavily on four-part vocal harmonies, with all four members alternating as lead vocalists; Westbrook and Sweet also play rhythm guitar.
Deka Moni (デカモニ。 ) was a Japanese group consisting of one member, volleyball player Motoko Obayashi, presumably chosen because of her height.
 She appears four times on the single cover to give the impression of a group with four members.
 Although Deka Moni is not a part of Hello!
 Project, Tsunku produced the single, which features a cover of Minimoni's "Jankenpyon!
" as its c/w track.
Furbaz are a Swiss vocal group consisting of members Marie Louise Werth, Giusep Quinter, Ursin Defuns and Gion Defuns, who perform mainly in the Romansh language.
 The group was formed in 1983 in Disentis, Graubünden, remaining active until the early 1990s.
 They then reunited in 2004, and continue performing together.
 Furbaz are best known internationally for their participation in the 1989 Eurovision Song Contest.
Sona Family is a London-based musical quartet.
 They have been said to sound "like The Black Eyed Peas infused with traditional Indian bhangra music".
 They combine urban music, hip hop, R&B and dancehall with their own upbringing as UK Desis. Headed by producer/writer Harry Sona, Sona Family consists of rapper/singer/producer Mr Riz, female singer/rapper Kazz & DJ/producer JC.
Cosmo4 is a Swedish girl group consisting of four members: Yasmine Qin, Ulrika Liljeroth, Jenny Rogneby, and Rudina Hatipi.
 The group has released two successful singles since 2006.
 Previously, Carin da Silva was a member of the group until late 2006, when Carin left to concentrate on her studies and Rudina replaced her.
 Before that, Cosmo4's other previous members are named Lisa and Johanna, who were only a part of Cosmo4 in 2004 with their debut single "Mexico".
 The girls hail from different parts of the world.
 Yasmine is from China, Jenny is from Kenya, Rudina is from Kosovo and Ulrika is from Sweden; all of the girls live in Sweden.
GP Wu (short for Gladiator Posse) was an American hip hop group consisting of four members, Pop Da Brown Hornet, Down Low Recka, Rubbabandz and June Luva.
 The group formed in 1993 and were one of the many affiliates of The Wu-Tang Clan.
The Black Eyed Peas (originally simply Black Eyed Peas) are an American group, consisting of rappers will.i.am, apl.de.ap, Taboo, and Fergie.
 Originally an alternative hip hop group, they subsequently changed their musical sound to pop and dance-pop music.
 Although the group was founded in Los Angeles in 1995, it was not until the release of their third album "Elephunk" in 2003 that they achieved high record sales.
 Since that time, the group has sold an estimated 76 million records (35 million albums and 41 million singles), making them one of the world's best-selling groups of all time.
 According to Nielsen SoundScan, The Black Eyed Peas were the second-best-selling artist/group of all time for downloaded tracks, with over 42 million sales as of the end of 2011.
The Piano Guys are an American musical group consisting of pianist Jon Schmidt, cellist Steven Sharp Nelson, videographer Paul Anderson, and music producer Al van der Beek.
 They gained popularity through YouTube, where in 2010 they began posting piano and cello compositions combining classical, contemporary, and rock and roll music, accompanied by professional-quality videos.
 In August 2016 the group surpassed one billion views on their YouTube channel, which at that time had nearly 5 million subscribers.
 Their first five major-label albums, "The Piano Guys", "The Piano Guys 2", "A Family Christmas", "Wonders", and "Uncharted" each reached number one on the "Billboard" Classical Albums and New Age Albums charts.
 The four group members all belong to the Mormon church and were middle-aged family men with other careers before they started the group.
The Miami String Quartet is an American string quartet.
 The group was founded in 1988 at The New World School of the Arts by John de Lancie in Miami, Florida.
 The Quartet was in Residence at Kent State University in Kent, Ohio, where all four members served as faculty members in the School of Music, and two still remain.
 The Quartet was the Grand Prize winner at the Fischoff competition, First Prize winners of the Concert Artists Guild competition, and prize winners at the London and Evian International Quartet Competitions.
 They were awarded the Cleveland Quartet Award and were named to the Chamber Music Society of Lincoln Center II Residency as well.
 The Miami Quartet has served as Artists in Residence at the Hartt School and Florida International University and perform and teach at the Kent Blossom Music Festival every summer.