Question: Marina and the Diamonds and Moist, are Welsh?

Context articles: Electra Heart
The Family Jewels (Marina and the Diamonds album)
Moist (Canadian band)
Power &amp; Control
Froot
The Family Jewels Tour
I'm a Ruin
Marina and the Diamonds
List of songs recorded by Marina and the Diamonds
Disconnect (song)

Electra Heart is the second studio album by Welsh singer Marina Diamandis, professionally known as Marina and the Diamonds.
 It was released on 27 April 2012 by 679 Artists and Atlantic Records.
 Diamandis collaborated with producers including Liam Howe, Greg Kurstin, Dr. Luke, Diplo and StarGate during its recording, and subsequently transitioned from the new wave musical styles seen throughout her debut studio album, "The Family Jewels" (2010).
 Their efforts resulted in a concept album inspired by electropop music, a distinct departure from her earlier projects.
 Lyrically, the album discusses topics of love and identity.
 Diamandis created the title character "Electra Heart" to represent female archetypes in popular American culture (House Wife, Beauty Queen, Homewrecker and Idle Teen).
The Family Jewels is the debut studio album by Welsh singer Marina Diamandis, known professionally as Marina and the Diamonds.
 It was released on 15 February 2010 by 679 Recordings and Atlantic Records.
 Diamandis collaborated with several producers including Pascal Gabriel, Liam Howe, Greg Kurstin, Richard "Biff" Stannard, and Starsmith during its recording.
 She identifies the lyrical themes as "the seduction of commercialism, modern social values, family and female sexuality."
Moist is a Canadian rock band that originally formed in 1992.
 It consists of David Usher as lead vocalist, Mark Makoway on lead guitars, Jonathan Gallivan on guitars, Kevin Young on keyboards, Francis Fillion on drums and Louis Lalancette on bass.
 The band's original drummer Paul Wilcox left the band just before its hiatus in 2000, and original bassist Jeff Pearce departed shortly after its reestablishment in early 2014.
"Power & Control" is a song by Welsh singer Marina Diamandis, professionally known as Marina and the Diamonds, from her second studio album, "Electra Heart" (2012).
 It was released on 20 July 2012 by 679 Artists and Atlantic Records as the second single from the record.
 Diamandis collaborated with former Swedish House Mafia member Steve Angello while writing the track, and enlisted Greg Kurstin to oversee its production.
 An electropop and power pop track, "Power & Control" describes the struggle between romantic partners in achieving superiority in their relationship.
Froot is the third studio album by Welsh singer and songwriter Marina Diamandis, professionally known as Marina and the Diamonds.
 It was originally scheduled to be released on 3 April 2015 by Neon Gold Records and Atlantic Records, although it was ultimately released on 13 March 2015 in reaction to unauthorised Internet leaks. Diamandis wrote all 12 tracks featured on the record by herself, and collaborated with producer David Kosten for their production.
The Family Jewels Tour is the first major headlining concert tour by Welsh singer-songwriter Marina Diamandis, known professionally as Marina and the Diamonds, in support of her debut album, "The Family Jewels".
 In December 2009, prior to the release of her album, she announced an eight-date concert tour for the United Kingdom in February 2010.
 Following the success of her British tour, with tickets selling out, Diamandis announced her second United Kingdom and Ireland tour, entitled The Gem Tour.
 Tour dates for the United States and mainland Europe, in countries such as France, Germany, the Netherlands and Switzerland, were shortly added.
 In May 2010, Diamandis announced sixteen dates for her third United Kingdom and Ireland tour in Autumn the following year.
 Marina announced on 14 October that her third headlining UK tour would be called The Burger Queen Tour.
"I’m a Ruin" is a song by Welsh singer-songwriter Marina Diamandis, professionally known as Marina and the Diamonds.
 It was released on 2 February 2015 as the third official single from her third studio album, "Froot", two months before the release of the album.
 A music video for the song was released the following day, and premiered on Noisey.
 During its initial premiere on BBC Radio 1 in the United Kingdom, host Huw Stephens announced that the song would be officially released as a single in the United Kingdom on 22 March 2015 .
 "I'm a Ruin" was praised by critics, who commended its production, lyrical content, and Diamandis' vocal delivery; it was further hailed as a highlight of "Froot".
Marina Lambrini Diamandis (Greek: Μαρίνα-Λαμπρινή Διαμαντή ; born 10 October 1985), known professionally as Marina and the Diamonds, is a Welsh singer-songwriter.
 Diamandis has described herself as an "indie artist with pop goals" and often analyses components of human behavior in her music.
 She is additionally known for her unconventional fashion styles.
The Welsh singer-songwriter Marina Diamandis, known by her stage name Marina and the Diamonds, has recorded songs for three studio albums and two extended plays.
 She first came to public prominence after being ranked in second place on the Sound of 2010 poll organised by the BBC.
 Her debut studio album "The Family Jewels" was released that February, and featured material from her first two extended plays, "The Crown Jewels EP" (2009) and "The American Jewels EP" (2010), in addition to newly recorded content.
 Diamandis co-wrote each of the album's thirteen tracks, including its five singles "Mowgli's Road", "Hollywood", "I Am Not a Robot", "Oh No!
", and "Shampain".
 Songwriters and producers Liam Howe and Pascal Gabriel respectively co-wrote four and three tracks for the record.
 In 2009 and 2010, Diamandis recorded cover versions of the songs "What You Waiting For?
" by Gwen Stefani and "Starstrukk" by 3OH!
3, respectively.
"Disconnect" is a song by British electronic music group Clean Bandit and Welsh singer-songwriter Marina and the Diamonds.
 It was composed by Marina and the Diamonds and Jack Patterson, with the song's production handled by Luke Patterson, Jack Patterson and Mark Ralph.
 It was released to digital retailers on 23 June 2017, as the fourth single from the band's upcoming second studio album.
 The song is Marina and the Diamonds' first single since her 2015 album "Froot".