Question: Are both Dan Swanö and Marie Currie singers?

Context articles: Morningrise
The Breathing Shadow
Pan.Thy.Monium
Messin' with the Boys
Cryptic (album)
Dan Swanö
Marie Currie
Nightmares Made Flesh
Young and Wild (album)
Cherie Currie

Morningrise is the second studio album by Swedish progressive metal band Opeth.
 It was released on June 24, 1996, in Europe by Candlelight Records and on June 24, 1997, in the United States by Century Black.
 The recording sessions took place at Unisound studio, in Örebro, between March and April 1996, and once more the band produced alongside Dan Swanö.
 "Morningrise" was the last Opeth album produced by Swanö.
 It was also the last Opeth release with drummer Anders Nordin and bassist Johan De Farfalla.
The Breathing Shadow is the first album by the band Nightingale.
 It was recorded and mixed within a week by Dan Swanö alone at his Unisound studio; Nightingale did not yet exist as a band, and was simply a solo project by Swanö.
 This is the only album of Nightingale to use a drum machine (the other albums have Swanö or someone else on drums).
 Unlike the hard rock/AOR-oriented direction of later albums, "The Breathing Shadow" showcases the style of goth rock similar to The Sisters of Mercy.
 The songs "Nightfall Overture" and "The Dreamreader" were re-recorded on the 2004 compilation album, "Nightfall Overture".
Pan.Thy.Monium was a Swedish avant-garde metal band formed and led by Dan Swanö with several members from another project of his, Edge of Sanity.
 The group disbanded in 1996, after recording "Khaooohs and Kon-Fus-Ion".
Messin' with the Boys is the second post-Runaways album by Cherie Currie, released in 1980 For this album Currie worked with her identical twin sister, Marie Currie.
 Their band was called "Cherie and Marie Currie".
 Marie was a guest vocalist on Cherie's first album, so Marie went on tour with Cherie to support her first album, "Beauty's Only Skin Deep".
 When Marie would join Cherie on stage to sing the encores the audience would go wild.
 So Cherie ran with the idea of two blonds are better than one.
 The idea paid off because "Messin' with the Boys" received more radio play than "Beauty's Only Skin Deep", and their song "Since You Been Gone" made it to 95 on US charts.
 The single "This Time" and the album Messin' with the Boys made the top 200 on U.S. charts.
 This makes Messin' with the Boys Cherie Currie's most successful album.
 "I Just Love the Feeling" originally surfaced on the 1974 album, "S.S. Fools" by the group of the same name.
 Cherie duetted with that group's lead singer, Bobby Kimball, and wrote the additional lyrics in the second verse.
Cryptic is the seventh full-length studio album by the Swedish death metal band Edge of Sanity, released on December 1, 1997 by Black Mark Production.
 It is the only Edge of Sanity album in which Dan Swanö does not contribute.
 Guitarist Andreas Axelsson hired a new vocalist (Roberth Karlsson, who was previously the vocalist in Swanö's avant-garde death metal band Pan.Thy.Monium) in an attempt to keep the band together.
Dan-Erland Swanö (born 10 March 1973) is a Swedish musician who is currently the vocalist, guitarist, ex-bassist and ex-drummer for the band Nightingale, lately vocalist, keyboardist and drummer for the band Witherscape, as well as the Owner of Unisound but he achieved fame as the vocalist and songwriter of progressive death metal band Edge of Sanity.
Marie Michelle Currie (born November 30, 1959) is an American singer, songwriter, actress, and artist.
 Currie is best known for playing in a band with her identical twin Cherie Currie called Cherie & Marie Currie.
 Their song "Since You Been Gone" charted at number 95 on the US charts.
 Marie played Singing Maid Marie in "The Rosebud Beach Hotel" and is now a popular multi-media sculptress and artist.
Nightmares Made Flesh is the second album by Swedish death metal band Bloodbath.
 It was released by Century Media Records on September 27, 2004.
 The only album to feature Peter Tägtgren, who was brought in to replace Mikael Åkerfeldt as the vocalist, as well as the first to feature Martin Axenrot to replace Dan Swanö as the drummer (with Swanö now playing guitar).
 This was Swanö's last album with Bloodbath.
Young and Wild is a compilation by Cherie & Marie Currie.
 This album has all 10 original tracks from Messin' with the Boys, six songs from Beauty's Only Skin Deep, three songs Cherie Currie sang with The Runaways, and one new track co-written by Marie Currie, "Longer Than Forever".
 "Longer Than Forever" was the B side of the single "Since You Been Gone".
Cherie Ann Currie (born November 30, 1959) is an American musician (instrumentalist, singer, songwriter), actress and artist.
 Currie was the lead vocalist of the Runaways, a rock band from Los Angeles, in the mid-to-late 1970s.
 After the Runaways, she became a solo artist.
 Then she teamed up with her identical twin sister, Marie Currie, and released an album with her.
 They released a duet "Since You Been Gone" which charted number 95 on US charts.
 Their band was called Cherie and Marie Currie.
 She is also well known for her role in the movie "Foxes".