Question: Which American heavy metal singer, nicknamed "Ripper" from the Judas Priest song, "The Ripper", performs alongside guitarist Yngwie Malmsteen on his 18th studio album, "Relentless"?

Context articles: Demolition (Judas Priest album)
No Parole from Rock 'n' Roll
Perpetual Flame
Steeler (American band album)
Street Lethal
Chris Tsangarides
Victim of Changes (album)
Inspiration (Yngwie Malmsteen album)
Tim &quot;Ripper&quot; Owens
Relentless (Yngwie Malmsteen album)

Demolition is the fourteenth studio album by British heavy metal band Judas Priest, the first in the decade of the 2000s.
 It is the second and final studio album to feature Tim 'Ripper' Owens on vocals.
 It is the only Judas Priest studio album to feature a Parental Advisory label due to some songs featuring profanity: "Machine Man," "Hell Is Home" and "Metal Messiah" all carry explicit markings on the album's iTunes page.
No Parole from Rock 'n' Roll was the first album by the American heavy metal band Alcatrazz led by veteran singer Graham Bonnet, released in 1983.
 It spent seven weeks on the "Billboard" 200 albums chart, peaking at No. 128.
 It is considered by fans of the group to be the best Alcatrazz release and launched guitarist Yngwie Malmsteen into a glittering solo career.
 The album is most famous for the singles "Island in the Sun" and "Jet to Jet".
 Other notable offerings are "Hiroshima Mon Amour", for which a video was shot (an excerpt for which was seen in the UK on the Channel 4 TV programme "The Tube"), "General Hospital" and "Incubus", a solo by Yngwie J. Malmsteen he continued to play during his solo career.
 It has always had a strong following in Japan and songs from which can still be found in karaoke bars today.
Perpetual Flame is the sixteenth studio album by guitarist Yngwie Malmsteen and his group Rising Force, released on 13 October 2008 in Europe and on October 14, 2008 in the US and Canada.
 It was his first album since 2005's "Unleash the Fury" and the first with ex-Judas Priest and Iced Earth singer Tim "Ripper" Owens.
 The album also features famed keyboardist Derek Sherinian on keyboards.
Steeler is the debut studio album by the American heavy metal band of the same name, released in 1983.
 It was largely recorded at Prairie Sun Studios in Cotati, California, about fifty miles north of San Francisco.
 It was the only album released by the band until a 2005 compilation album released by singer Ron Keel.
 After the album was released the band broke up.
 In 1983 guitarist Yngwie Malmsteen joined the band Alcatrazz.
 Ron Keel formed the band Keel.
Street Lethal is the first studio album by the American heavy metal band Racer X, released on January 1, 1986 through Shrapnel Records.
 The instrumental track "Y.R.O." stands for "Yngwie Rip-Off", as it bears similarities to "Black Star" by guitarist Yngwie Malmsteen (from his 1984 album "Rising Force"), with an almost identical bassline.
 It later appeared in the 2009 video game "Brütal Legend".
Christopher Andrew "Chris" Tsangarides is a British Grammy-nominated record producer, sound engineer, and mixer.
 He is best known for his work with many heavy metal bands, including Judas Priest, Anvil, Gary Moore, Thin Lizzy, Helloween, Angra, Anthem, Yngwie Malmsteen and Tygers of Pan Tang.
 Tsangarides has worked with many pop and alternative artists as well, including Depeche Mode, Tom Jones, Concrete Blonde, and The Tragically Hip.
Victim of Changes is ex-Judas Priest singer Al Atkins's fourth release, named after a Judas Priest song of the same name originally featured on the "Sad Wings of Destiny" album.
 The album's sleeve contains three pages of historic photos and a biography outlining his days in Judas Priest.
 Former Judas Priest drummer Dave Holland plays on this release.
Inspiration is the ninth studio album by guitarist Yngwie Malmsteen, released on 14 October 1996.
 It is a tribute album consisting entirely of covers of various bands who influenced Malmsteen.
 Featured on vocals are Jeff Scott Soto, Mark Boals and Joe Lynn Turner, all of whom performed on Malmsteen's first four studio albums.
Timothy S. "Ripper" Owens (born September 13, 1967) is an American heavy metal singer who currently performs with Beyond Fear, Yngwie Malmsteen's Rising Force and Charred Walls of the Damned.
 He first gained attention as the lead singer of Judas Priest, and then Iced Earth.
 He took the nickname "Ripper" from the Judas Priest song "The Ripper" during his time in the tribute band "British Steel".
Relentless is the eighteenth studio album by guitarist Yngwie Malmsteen, released on November 23, 2010, through his independent label Rising Force Records.
 It is his second album with ex-Judas Priest and ex-Iced Earth singer Tim "Ripper" Owens, after 2008's "Perpetual Flame".