Question: Are both Doc Neeson and Jang Hyun-seung singers?

Context articles: Trouble Maker (duo)
Highlight (band)
Comin' Down (The Angels song)
No Secrets (song)
Tour of Duty – Concert for the Troops
The Angels discography
Doc Neeson
The Angels (Australian band)
Jang Hyun-seung
Am I Ever Gonna See Your Face Again

Trouble Maker () is a duo formed by Cube Entertainment in 2011, composed of Kim HyunA and Jang Hyun-seung.
Highlight (Korean: 하이라이트 ) is a South Korean boy band formerly known as Beast (Korean: 비스트).
 The band consists of five members: Yoon Doo-joon, Yong Jun-hyung, Yang Yo-seob, Lee Gi-kwang, and Son Dong-woon.
 Original member Jang Hyun-seung officially left the group in April 2016.
 Later that year, the five remaining members moved labels from Cube Entertainment to Around Us Entertainment and subsequently changed their name to Highlight in 2017.
"Comin' Down" is the third single by Australian hard rock band the Angels, released in March 1978.
 The song was released from their album, "Face to Face".
 The song first peaked on 8 May 1978 where it peaked at number 80 on the Kent Music Report Singles Chart and stayed in the charts for five weeks.
 It was co-written by band members, Doc Neeson, John Brewster and Richard Brewster.
"No Secrets" is a song by Australian hard rock group, The Angels, released in May 1980 from their album, "Dark Room".
 "No Secrets" peaked at number 8 on the Kent Music Report Singles Chart.
 It was co-written by band members, Graham "Buzz" Bidstrup and Bernard "Doc" Neeson.
Tour of Duty – Concert for the Troops was a concert in 1999 in Dili for the Australian troops serving with the International Force for East Timor.
 This concert featured John Farnham, Kylie Minogue, Doc Neeson, Gina Jeffreys, James Blundell, The Living End, Dili Allstars and the RMC Band.
The Australian hard rock band, the Angels, have released thirteen studio albums, three live albums, six extended plays and forty-seven singles.
 The Angels were formed in Adelaide in 1974 by the Brewster brothers, John and Rick, together with Bernard "Doc" Neeson.
 The line-up of the band has since gone through numerous changes with Rick as the mainstay member.
 They are known as Angel City internationally (to avoid confusion with now defunct 70's glamsters Angel) and later albums were released as The Angels from Angel City.
 The Band always hated the international names.
 Not all albums are available internationally and the ones that have been released generally have a different track listing and often an altered album cover from the original Australian releases.
Bernard Patrick "Doc" Neeson OAM (4 January 1947 – 4 June 2014) was an Australian singer-songwriter and musician.
 He was the front man for the hard rock band The Angels from its formation in February 1976 to their disbandment in December 1999.
 For the group Neeson was the main lyricist with brothers, John and Rick Brewster, as the music composers.
 Their top 20 studio albums on the Australian Kent Music Report Albums Chart are "Face to Face" (June 1978), "No Exit" (June 1979), "Dark Room" (June 1980), "Night Attack" (November 1981), "Watch the Red" (May 1983), "Two Minute Warning" (November 1984) and "Howling" (October 1986).
 Their number-one album, "Beyond Salvation", on the ARIA Albums Chart appeared in February 1990 and was followed by another top 20 album, "Red Back Fever" (November 1991).
 The group's top 20 singles on the related Australian charts are "No Secrets" (1980), "Into the Heat" (1981), "Never so Live" (1981), "We Gotta Get out of This Place" (1987), "Am I Ever Gonna See Your Face Again" (live, 1988), "Let the Night Roll On" (1990) and "Dogs Are Talking" (1990).
The Angels are an Australian rock band which formed in Adelaide in 1974 as The Keystone Angels by John Brewster on rhythm guitar and vocals, his brother Rick Brewster on lead guitar and vocals, and Bernard "Doc" Neeson on lead vocals and guitar.
 They were later joined by Graham "Buzz" Bidstrup on drums and vocals, and Chris Bailey on bass guitar and vocals.
 In 1981 Bidstrup was replaced on drums by Brent Eccles.
 Their studio albums on the Kent Music Report Albums Chart top 10 are "No Exit" (July 1979), "Dark Room" (June 1980), "Night Attack" (November 1981), "Two Minute Warning" (November 1984), "Howling" (October 1986) and "Beyond Salvation" (February 1990).
 Their top 20 singles are "No Secrets" (1980), "Into the Heat" (1981), "We Gotta Get out of This Place" (1987), "Am I Ever Gonna See Your Face Again" (live, 1988), "Let the Night Roll On" and "Dogs Are Talking" (both 1990).
Jang Hyun-seung (; born September 3, 1989) most often credited as Hyunseung, is a South Korean singer.
 He is best known as a former member of the boy group Beast, under the label Cube Entertainment.
 With Beast, he has released singles and albums in both Korean and Japanese.
 Beast won the Artist of the Year (Daesang) award at the Melon Music Awards in 2011.
"Am I Ever Gonna See Your Face Again" is an Australian rock song written by Doc Neeson, John Brewster and Rick Brewster, and performed by their group, the Angels.
 The song was initially recorded as a ballad in March 1976 but subsequently re-released as a rock song.
 The song is best known for the expletive-laden audience response, "No Way, Get Fucked, Fuck Off", to the live version, which was issued in March 1988.
 This chant has been described by "The Guardian"' s Darryl Mason as "one of the most famous in Australian rock history".