Question: Was Kai Hansen or Andy Biersack both a pianist and a singer?

Context articles: Keeper of the Seven Keys: Part I
Black Veil Brides
Kai Hansen
Helloween
In the End (Black Veil Brides song)
Andy Biersack
Land of the Free (Gamma Ray album)
Gamma Ray (band)
American Satan
Fallen Angels (Black Veil Brides song)

Keeper of the Seven Keys: Part I is the second studio album by German power metal band Helloween, released in 1987.
 It marks the first appearance of vocalist Michael Kiske, and is considered the album that created the genre of European-style power metal.
 Kai Hansen stepped away from doing vocal duties as he had difficulties singing and playing the guitar at the same time during the previous tour.
 It was an album dominated by Hansen, due to an injury to co-guitarist Michael Weikath which prevented him from performing on much of the album. "
Future World" was released as a single and a music video was made for "Halloween" but with 8 minutes omitted from the song.
 The band originally planned to release "Keeper of the Seven Keys: Part I" and "" as a double album, but their record label refused, insisting that the albums be released separately.
 Much later in 2010, both albums were released together with bonus tracks.
Black Veil Brides is an American rock band based in Hollywood, California.
 The group formed in 2006 in Cincinnati, Ohio and is currently composed of Andy Biersack (lead vocals), Ashley Purdy (bass, backing vocals), Jake Pitts (lead guitar), Jinxx (rhythm guitar, violin) and Christian "CC" Coma (drums).
 Black Veil Brides are known for their use of black makeup, body paint, tight black studded clothing, and long hair, which were all inspired by the stage personas of KISS and Mötley Crüe, as well as other 1980s glam metal acts.
Kai Michael Hansen (born 17 January 1963) is a heavy metal guitarist and vocalist.
Helloween is a German power metal band founded in 1984 in Hamburg, Northern Germany by members of bands Iron Fist and Gentry.
 Its first line-up consisted of singer and guitarist Kai Hansen, bass guitarist Markus Grosskopf, guitarist Michael Weikath, and drummer Ingo Schwichtenberg.
 After the release of a self-titled EP and their debut album "Walls of Jericho" in 1985, it expanded into a quintet with the addition of singer Michael Kiske, Hansen choosing to focus on guitar instead.
 Under this line-up, they released the "Keeper of the Seven Keys" albums (1987 and 1988), which established Helloween as a notable heavy metal band and led to the creation of the power metal subgenre.
 However, Hansen left the band quickly after the release of "Part II" and was replaced by Roland Grapow.
 He then created the band Gamma Ray.
"In the End" is a song by American rock band Black Veil Brides, from their third studio album, "".
 The song was released on October 31, 2012 as the first single from "Wretched and Divine", and is Black Veil Brides' sixth single.
 It was released on the same date as the availability for pre-order purchases for the entire album.
 The song peaked at number 39 on the "Billboard" Rock Songs chart and remained on the charts for two weeks.
 "In the End" was featured as a bonus track on the compilation album "Now That's What I Call Music!
 45".
 It was also one of the two themes for the 2012 WWE "Hell in a Cell" pay-per-view event.
 The song also appears in the video games "Guitar Hero Live" and "NHL 14".
 The band received "Revolver"'s 2013 Golden Gods Award for Best New Song for "In the End."
 The song was written after the death of Black Veil Brides' lead vocalist Andy Biersack's grandfather.
Andrew Dennis Biersack (born December 26, 1990), formerly known as Andy Six, is an American singer and pianist.
 He is the founder and lead vocalist for the American rock band Black Veil Brides, and is its only remaining original member.
 In May 2014, he started a solo music project under the moniker Andy Black and released his debut album, "The Shadow Side", in 2016.
Land of the Free is the fourth studio album by German power metal band Gamma Ray, released in 1995.
 Continuing a trend that would conclude with the band's fifth studio release, the lineup for the album was different from the previous one, as "Land of the Free" was the first Gamma Ray album to be released since the departure of Ralf Scheepers, leaving Kai Hansen to take up lead vocals.
 While not his first stint as a vocalist (Hansen had sung lead for Helloween until 1987 and had also recorded lead vocals on "Heal Me" from "Insanity and Genius"), it would be the first time he had performed lead vocals exclusively in 8 years.
Gamma Ray is a power metal band from Hamburg, northern Germany, founded and fronted by Kai Hansen after his departure from the German power metal band Helloween.
 Hansen is the current lead vocalist, guitarist as well as the chief songwriter of Gamma Ray.
 The band is known as one of the most prominent bands of the German heavy metal scene.
American Satan is an upcoming American thriller film written by Ash Avildsen and Matty Beckerman.
 It is set to be released in theaters on Friday the 13th of October.
 and features rock artists Andy Biersack, Ben Bruce, and Drake Bell.
 (Andy Biersack's singing vocals to be played by Remington Leith).
 It also stars Denise Richards, Malcolm McDowell, Booboo Stewart, and Tori Black.
"Fallen Angels" is the third single by the American rock band, Black Veil Brides, and the first single from their second album "Set the World on Fire".
 The song is inspired by the biblical story told in the Book of Revelation, Chapter 12, in which Satan and one-third of God's angels rebelled against God, starting a war in Heaven and were therefore cast out of Heaven to the earth, becoming "fallen angels." The story was introduced to Andy Biersack and the Black Veil Brides by their band artist Richard Villa: