Question: Are both Holly Johnson and Joe Lynn Turner musicians?

Context articles: Holly Johnson
Icarus Witch
Emotional Fire
Under Cover 2
Rainbow (rock band)
Tom Merlynn
Lynn Turner (murderer)
Fire Without Flame
Joe Lynn Turner
The Battle Rages On...

William Holly Johnson (born 9 February 1960), born William Johnson and known professionally as Holly Johnson, is an English artist, musician and writer, best known as the lead vocalist of Frankie Goes to Hollywood, who achieved huge commercial success in the mid-1980s.
 Prior to that, in the late 1970s he was a bassist for the band Big in Japan.
 In 1989, Johnson's debut solo album, "Blast", reached number one in the UK albums chart.
 Two singles from the album – "Love Train" and "Americanos" – reached the top 5 of the UK Singles Chart.
 In the 1990s he embarked on a painting career.
Icarus Witch is a heavy metal band from Pittsburgh, Pennsylvania, United States, formed in 2003 by bassist Jason Myers.
 The band has 5 CDs on Cleopatra Records.
 They were founding members of the "New Wave of Traditional Metal" according to Metal Hammer U.K. Magazine and have since progressed into a melodic metal style merging influences of classic metal, AOR, goth and modern heavy rock.
 Icarus Witch have toured with bands such as Y&T, Trouble, White Wizzard and former Iron Maiden singer Paul Di'Anno, the latter of which they also performed as backing musicians for.
 Additionally they have opened played with Heaven and Hell at one of Ronnie James Dio's final performances.
 Icarus Witch have had notable guest stars on their albums including George Lynch (Dokken, Lynch Mob), Joe Lynn Turner (Deep Purple, Rainbow, Yngwie Malmsteen), Frank Aresti (Fates Warning) and Michael Romeo (Symphony X).
Emotional Fire is the third album from Sunstorm, an AOR project formed by former Rainbow singer Joe Lynn Turner and featuring members of German rock band Pink Cream 69.
 On "Emotional Fire" Turner pays tribute to his 1980's sessions as a backing vocalist for the likes of Michael Bolton and Cher.
 The album was released on February 28, 2012 by Frontiers Records.
Under Cover 2 is the 5th solo album of Joe Lynn Turner released in 1999.
 Just like "Under Cover", the album consists mainly of covers of Turner's favourite artists.
 Due to successful sales of the previous edition, the label asked him to record a follow-up.
 "The Race Is On" is a re-recorded version of a song that appeared on Turner's solo debut album, "Rescue You".
Rainbow (also known as Ritchie Blackmore's Rainbow or Blackmore's Rainbow) are a British rock band led by guitarist Ritchie Blackmore, active from 1975 to 1984, from 1993 to 1997, and from 2015 to the present.
 They were originally established with Ronnie James Dio's American rock band Elf, but after their first album, Blackmore fired the backing members and continued with Dio until 1979.
 Three British musicians joined in 1979, singer Graham Bonnet, keyboardist Don Airey, former Deep Purple bassist Roger Glover, and this line-up gave the band their commercial breakthrough with the single "Since You Been Gone".
 Over the years Rainbow went through many line-up changes with no two studio albums featuring the same line-up.
 Other lead singers Joe Lynn Turner and Doogie White would follow, and the project consisted of numerous backing musicians.
 A pioneer to power metal, the band's early work primarily featured mystical lyrics with a neoclassical metal style, but went in a more streamlined, commercial direction following Dio's departure from the group.
Tom Merlynn (July 26, 1955), is an American singer, Songwriter, Producer, Engineer known for his works with singer Joe Lynn Turner.
 Tom Merlynn has worked on hard rock projects such as Rated X, with Joe Lynn Turner, Carmine Appice, Tony Franklin and Karl Cochran on the Frontiers Record Label.
 Sunstorm (band), the Jan Holberg Project, Tobias Sammett - The Mystery of Time, Doo-wop group The Wizards featuring Joel Katz and many others.
 Tom has also written and produced various Television and Radio Commercials as well as many marketing projects for Thumann's, Inc., Carlstadt, NJ.
Lynn Turner (July 13, 1968 – August 30, 2010), born Julia Lynn Womack, was an American convicted murderer.
 In 1995, her husband, Glenn Turner, died after allegedly being sick with the flu.
 In 2001, the death of what had been described as her common law husband, Randy Thompson, under remarkably similar circumstances, aroused the suspicion of law enforcement.
 After investigation, it was determined by authorities that Lynn Turner had murdered both her husbands by poisoning them with ethylene glycol-based antifreeze.
 She was tried for Glenn Turner's murder in 2004.
 She was found guilty and went to trial again for murdering Randy Thompson in 2007, ultimately being convicted.
 Turner died in prison on August 30, 2010.
 The cause of death was an apparent suicide by toxic overdose of blood pressure medication.
Fire Without Flame is a hard rock album by Akira Kajiyama and Joe Lynn Turner.
 This is the first release under both their names.
 "Fire Without Flame" is more of a return to "Slam" era sensibilities: a blistering blues infused hard rock album, on which Kajiyama handled all instruments and production himself.
 While absent of song writing credits, it’s assumed that Turner contributed all lyrics and vocal melodies.
Joe Lynn Turner (born Joseph Arthur Mark Linquito, August 2, 1951) is an American singer, guitarist, songwriter, and producer.
 He is known for his work in the hard rock bands Rainbow and Deep Purple.
 During his career, Turner fronted and played guitar with pop rock band Fandango in the late 1970s; and in the early 80s, he became a member of Rainbow, fronting the band and writing songs with guitarist, Ritchie Blackmore and bassist, and producer, Roger Glover.
 After Rainbow had disbanded (the first time) in March 1984, he pursued a solo career, released one album, Rescue You, and then later did session work, singing background vocals for the likes of Billy Joel, Cher, and Michael Bolton.
 On the advice of Bolton, Turner began recording jingles for radio and television.
 Other songs he had composed or through collaboration with songwriters like Desmond Child and Jack Ponti were being recorded and released by international recording artists Jimmy Barnes, Lee Aaron, and Bonfire.
 Turner had a short-lived association with neoclassical metal guitarist Yngwie Malmsteen and then Deep Purple.
 From the mid-1990s, he resumed his solo career, releasing an additional nine studio and two live recordings.
 Turner did other session work, appearing as lead vocalist on tribute albums and working on projects involving various musical groups including progressive rock band Mother's Army; Bulgarian hard rock band Brazen Abbot; funk rock duo Hughes Turner Project; and classic rock/ progressive rock band Rated X.
 In 2006, Frontiers Records approached Turner to become involved with the AOR side project Sunstorm.
 By 2016, four albums under the Sunstorm name had been released.
 That same year, Turner released "The Sessions" via Cleopatra Records featuring a veritable who's who of classic rock royalty as guest musicians, before resuming his seemingly constant touring schedule back in Europe
The Battle Rages On... is the fourteenth studio album by the British hard rock band Deep Purple, released in 1993.
 It is the last album recorded with the band's classic Mk II line-up, which reunited for a second time (the first reunion being for 1984's "Perfect Strangers").
 Even though Mike DiMeo was initially chosen as the singer for the album after Joe Lynn Turner was fired, Ian Gillan eventually returned to the band in late 1992 and had to rework much of the material already existing for it, which had been intended for Joe Lynn Turner and DiMeo.
 After his firing, Turner would admit Ritchie Blackmore referred to the album as "The cattle grazes on".
 Blackmore became infuriated at the non-melodic elements and quit mid tour after the show of 17 November in Helsinki, Finland.
 American guitarist Joe Satriani joined Deep Purple as a temporary replacement for the duration of the tour.
 A handful of working tracks written during "The Battle Rages On..." sessions would turn up on subsequent solo releases by Turner, under different titles.