Question: Are singers Ken and Brett Scallions both members of a band?

Context articles: Deliverance (rock band)
Puppet Strings
Ken (singer)
Yeah! (Fuel song)
Brett Scallions
The Best of Fuel
101 Ranch Boys
Soul to Preach To
Circus Diablo
Brett Domino

Deliverance was a German-Canadian Christian pop and rock music band that was active in the 1970s until 1981.
 Danny Janz, Ken Janz, and Paul Janz formed Deliverance in Lörrach, Germany though the three were from Calgary, Alberta, Canada.
 All three were raised in Basel, Switzerland and attended Black Forest Academy.
 Danny and Paul Janz had already performed together as "Danny and Paul" but joined with Ken in 1974 to form Deliverance – combining the "Janz Team Singers" with "Danny, Paul & Wayne" and created a dynamic new band.
 Guy Roellinger and Dave McSparran also joined the band during its history.
 The band released four albums before Paul Janz embarked on a solo career.
Puppet Strings is the fifth studio album by American rock band Fuel.
 Released March 4, 2014, it is their first studio effort since 2003's "Natural Selection" to feature original lead singer Brett Scallions and the first Fuel album not to feature original songwriter/guitarist, Carl Bell and bassist Jeff Abercrombie.
 Additionally, no one who participated in the recording of Fuel's previous album "Angels & Devils" participated in the recording of "Puppet Strings".
Lee Jae-hwan (Hangul: 이재환 born April 6, 1992), better known by his stage name Ken (Hangul: 켄 ), is a South Korean singer and actor, signed under Jellyfish Entertainment.
 He is one of the members in the South Korean boy group VIXX and has been widely praised for his unique, soulful, and husky vocal tone.
 Ken began his acting career in 2014 in MBC Every 1's comedy drama "Boarding House No. 24" as Lee Jaehwan.
"Yeah!"
 is the first song released from Fuel's album "Puppet Strings".
 It is also the first song released featuring original lead singer Brett Scallions since Fuel's 2003 studio album "Natural Selection".
Brett Allen Scallions (born December 21, 1971) is an American musician.
 He is the lead vocalist, rhythm guitarist, and lyricist of post-grunge band Fuel.
The Best of Fuel is a compilation album by American hard rock band Fuel.
 It contains songs from their first three full-length albums, "Sunburn", "Something Like Human", and "Natural Selection".
 All of the said albums featured vocalist Brett Scallions who departed from the group only a few months after the compilation's release.
 "The Best of Fuel" consists solely of the band's released singles, with the exception of "Million Miles" from "Natural Selection" (it features "Quarter" from the same album instead).
The 101 Ranch Boys was an American country western band.
 Formed in Kansas City, Kansas in the 1930s the group was based in York, Pennsylvania where they broadcast their own local radio program on WSBA (AM).
 They later had their own radio program for ABC radio which was broadcast both nationally and internationally through affiliates.
 They recorded albums for Columbia Records and also gave concerts internationally; both as a band and accompanying famous country singers.
 Some of the artists they performed with were Gene Autry, Rex Allen, Ken Maynard, Jimmy Wakely, and Ken Curtis.
"Soul to Preach To" is the first single released from Fuel's album "Puppet Strings".
 It is also the first single released featuring original lead singer Brett Scallions since Fuel's 2003 studio album "Natural Selection".
Circus Diablo is an American rock band, formed in early 2006 by Billy Morrison (vocals), Billy Duffy (lead guitar) and Ricky Warwick (rhythm guitar).
 Fuel frontman Brett Scallions and Velvet Revolver drummer Matt Sorum subsequently joined the band on bass and drums, respectively.
 To date, Circus Diablo have released one studio album, entitled "Circus Diablo".
Brett Domino is the alter-ego of musician and comedian Rob J. Madin.
 As Brett Domino, he is a YouTube musician and internet celebrity from Leeds, West Yorkshire, England, UK.
 He is the best.
 Known for his YouTube videos, he plays covers, medleys and original songs on various musical instruments; most notably the keytar and Stylophone.
 His band The Brett Domino Trio currently consists of only two members - Brett Domino and 'Steven Peavis' (Ste Anderson) and during comic relief 2017, Russell Brand became a honorable member for the night making it an actual trio, having only actually been a three-piece for around a year.
 'Mitch Hutchinson' (Michael Denny) left the band in 2009 to become a fork-lift truck driver, he later returned to celebrate the band's fifth anniversary and appear on the finale of "Brett Domino's Weekly YouTube Thing."