Question: Did Matt Thiessen and Paul Di'Anno perform in rock bands?

Context articles: Paul Di'Anno
Matt Thiessen
Icarus Witch
Killers Live at the Whiskey
Di'Anno (album)
My Girlfriend (Relient K song)
Gogmagog (band)
Di'Anno
Rebuild (song)
List of songs recorded by Iron Maiden

Paul Andrews (born 17 May 1958), better known by his stage name Paul Di'Anno, is a British singer best known as the first vocalist to record with heavy metal band Iron Maiden, from 1978 to 1981.
Matthew Arnold "Matt" Thiessen (born August 12, 1980) is a Canadian-American musician, singer and songwriter known for being co-founder, lead singer, guitarist, pianist, and primary songwriter for the Christian rock band Relient K.
 With Relient K, he has released eight full-length albums, including three that were certified Gold, and three that peaked in the top twenty on the "Billboard" 200.
 Outside of his work with Relient K, Thiessen maintains a low-profile side project called Matthew Thiessen and the Earthquakes.
 In 2009, he co-produced and collaborated on Owl City's album "Ocean Eyes".
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).
Killers Live at the Whiskey is a live album by the former Iron Maiden singer Paul Di'Anno and his band Killers.
 The album was apparently recorded at the Whisky a Go Go club in Los Angeles however it is suspected that it was recorded in the studio with crowd noise mixed in the recording.
 The exact recording date is unknown.
 The title of the CD has been misspelled as the name of the club is actually written without the "e".
 The album contain songs from Di'Anno's solo career and four songs from his back catalogue with Iron Maiden.
Di'Anno is the 1984 self-titled album of the band of the same name.
 The lead singer Paul Di'Anno had been the frontman of the British heavy metal band Iron Maiden for three years, before being dismissed for his erratic behaviour.
 The band bearing his name and playing very commercial heavy rock was his first and short-lived solo project.
"My Girlfriend" is a song by the Christian rock band Relient K, released on their self-titled first album.
 The song originally appeared as "Marilyn Manson Ate My Girlfriend" on the band's demo album, "All Work and No Play".
 The song is about Marilyn Manson eating Matt Thiessen's girlfriend.
 Thiessen wrote this song when he was 15 years old.
 Thiessen has said that he wrote it because of a female friend, who lived eight hours away in Pennsylvania, who he would talk to about many things including spiritual matters such as where God was taking them in the future.
 His friend would later turn from Christian music to Nine Inch Nails and Marilyn Manson.
 In an interview with CCM Magazine Thiessen stated "through this she changed her lifestyle [and] what she believed in."
 His friend would later be expelled from school and would be kicked out of her house and sent to a youth detention center.
 Thiessen would later state "She felt that Christianity was stupid and just this big hypocrisy.
 Being young and impressionable, I just wrote this little, stupid song, but that was the way I dealt with it—writing this song about how she got so consumed by Marilyn Manson."
Gogmagog were a British supergroup put together by British record producer Jonathan King that featured former Iron Maiden members Paul Di'Anno and Clive Burr, former White Spirit and Gillan guitarist Janick Gers, Def Leppard guitarist Pete Willis, and bassist Neil Murray (Whitesnake and other bands).
 Two of the songs recorded were written by King; the third by composer Russ Ballard.
 Originally, the supergroup was to contain David Coverdale, John Entwistle and Cozy Powell, but this line-up "wasn't working out", according to Di Anno.
 He also insisted that he hated the finished product and that he "only did it for the money".
Di'Anno was a band featuring former Iron Maiden singer Paul Di'Anno, whom the band was named after.
"Rebuild" is a song written by Jon Foreman of Switchfoot and Matt Thiessen of Relient K.
 The song was written in conjunction with the bands' 2007 Appetite for Construction Tour, featuring members from all three bands on tour, Switchfoot, Relient K, and Ruth.
 Thiessen sang second vocals, and Dustin Ruth of Ruth played harmonica.
Iron Maiden are an English heavy metal band formed by bassist Steve Harris in 1975.
 The band's first album, 1980's "Iron Maiden", was written primarily by Harris, with vocalist Paul Di'Anno co-writing two tracks and guitarist Dave Murray contributing "Charlotte the Harlot".
 The 1981 follow-up, "Killers", was written almost entirely by the bassist, with frontman Di'Anno contributing only to the title track, "Killers" (the North American bonus track "Twilight Zone" was credited to Harris and Murray).
 Bruce Dickinson replaced Di'Anno after the release of "Killers", although he did not contribute any songwriting to "The Number of the Beast", released in 1982, which featured three songs co-written by guitarist Adrian Smith.
 "The Number of the Beast" also spawned Iron Maiden's first UK Singles Chart top ten in the form of "Run to the Hills", which charted at number seven on its release.
 It was not until 1983's "Piece of Mind" that the songwriting process became a more varied and collaborative approach, with just four of its nine tracks being credited solely to Harris, two to Dickinson and Smith, one to Harris and Murray, one to Dickinson alone, and one to Harris, Dickinson, and Smith.
 The Dickinson and Smith-penned "Flight of Icarus" was the first Iron Maiden single to chart in the United States, reaching number eight on the "Billboard" Mainstream Rock chart.