Question: JC Chasez and ZP Theart, are American?

Context articles: Event Horizon (album)
Ultra Beatdown
Shadow Warriors (band)
JC Chasez
Twilight Dementia
Blowin' Me Up (With Her Love)
ZP Theart
Revolution Deathsquad
I Am I (band)
United World Rebellion

Event Horizon is the debut studio album by British heavy metal band I Am I, released in 2012.
 The album was originally released on USB, then onto CD format, making I Am I the first heavy metal band ever to release an album only on USB first.
 The album has a few traces of the power metal sound of ZP's previous band DragonForce.
 The album has been described as "old school meets new school" by lead vocalist and co-writer ZP Theart.
 The album is quite melodic and a bit similar to the AOR of the 1970s and 1980s.
 The lyrics deal with human emotions, social life, and issues that people struggle with.
Ultra Beatdown is the fourth studio album by English power metal band DragonForce, released on 20 August 2008 in Japan through JVC and on 26 August 2008 worldwide through Roadrunner Records and Spinefarm Records.
 "Ultra Beatdown" is the last studio album to feature ZP Theart on vocals and the first one to feature Frédéric Leclercq on the bass guitar.
Shadow Warriors was a British comedy power metal band, formed by guitarist Sam Totman in late 2000 as a "secret" side project of DragonForce.
 The band also featured ZP Theart as lead vocalist and two other Fictional members, drummer Jyuohki and bassist Kazuma, the two "members" are actually drum machine and bass parts played by Sam Totman.
 The band performed Power Metal music with Japanese Warrior-based lyrics, such as Ninjas and Samurai.
Joshua Scott "JC" Chasez ( ; born August 8, 1976) is an American singer, songwriter, dancer, record producer, and occasional actor.
 He started out his career as a cast member on "The Mickey Mouse Club" before rising to stardom with *NSYNC, and by writing and producing for music acts such as Girls Aloud, Basement Jaxx, David Archuleta, and Matthew Morrison.
 He also served as a judge for "America's Best Dance Crew".
Twilight Dementia is the first live album by English power metal band DragonForce, released in Japan on 8 September 2010, the United Kingdom on 13 September and in the United States on September 14.
 The album was recorded in November and December 2009 during the United Kingdom leg of the "Ultra Beatdown" world tour, across nineteen different shows.
 The album features songs from all the band's previous albums.
 It is the last overall release to feature ZP Theart as the lead vocalist.
"Blowin' Me Up (With Her Love)" is the debut single by American recording artist JC Chasez.
 The song was released as a single from the soundtrack to the 2002 film "Drumline" and was included on Chasez's debut studio album "Schizophrenic".
 In the United Kingdom, the single was released as a double A-side with Chasez' following single, "Some Girls (Dance with Women)" in February 2004.
ZP De Villiers Theart (born 27 May 1975) is a South African singer, songwriter, and the lead vocalist for Skid Row.
 Theart first garnered attention as the original singer of British power metal band DragonForce.
 His name "ZP" is not an abbreviation, but his grandfather's initials (whose name was Zachery Paul).
"Revolution Deathsquad" is a song by English power metal band DragonForce.
 The song was released as the third and final single from their first major label album and third album overall "Inhuman Rampage".
 It was first released via web streaming on their official MySpace profile in late 2006.
 A music video for the song was never made.
 The single was released for download on iTunes.
 The song is available as a download to play on "" alongside "Through The Fire And Flames" and "Operation Ground and Pound".
 It is one of the band's heaviest songs, with screaming backing vocals, under a keyboard solo, a chugging, extreme-metal-oriented guitar, and a powerful, yet dark scream from vocalist ZP Theart toward the end.
I Am I.(stylized I ΛM I) is an English heavy metal band led by former DragonForce vocalist, ZP Theart.
 The band released their debut album "Event Horizon" in 2012, followed by two singles, one of which is a cover of John Farnham's "You're the Voice" and the other is an original song titled "See You Again".
 The band are currently in production of their sophomore album, which was expected to be released in November or December 2015, but as of January 2017, it hasn't been released yet.
United World Rebellion is a series of three extended plays from the American heavy metal band Skid Row.
 The first and second chapters were released on April 16, 2013 and August 5, 2014 by Megaforce Records.
 The final EP to complete the trilogy was scheduled for 2015 but pushed back to 2016.
 The first two EPs were Skid Row's final recordings with singer Johnny Solinger.
 The third EP now scheduled for 2017 will feature new lead singer ZP Theart.
 The group plans to release all three EPs as a theme album when all the EP's are released.