Question: Are Cristina Scabbia and Laura Stoica both composers?

Context articles: Worlds Collide
Kobra and the Lotus
Laura Stoica
Heaven's a Lie
Comalies
Cristina Scabbia
Watch Over You
Dieci stratagemmi
Future (Schiller album)
À Tout le Monde

Worlds Collide is the sixth studio album from Finnish metal band Apocalyptica, released on 14 September 2007.
 It includes special guests Till Lindemann, Corey Taylor, Adam Gontier, Dave Lombardo, Tomoyasu Hotei, and Cristina Scabbia.
 For the US release, a new recording of "I Don't Care" and a new mix of "I'm Not Jesus" replaced the original versions.
In 2009, Kobra and the Lotus was formed by classical singer Kobra Paige.
 The band started recording their first songs in Calgary, initially produced by Greg Godovitz (Goddo).
 Kobra and the Lotus put the initial studio tracks on MySpace in summer 2009 and were discovered by Metal Hammer and approached to include Kobra Paige in the 2010 Metal Hammer Maidens of Metal Calendar with Simone Simons, Epica and Cristina Scabbia, Lacuna Coil.
Adriana-Laurenția "Laura" Stoica (10 October 1967 – 9 March 2006) was a Romanian singer, composer and actress.
Heaven's a Lie is the first single by Lacuna Coil from their album "Comalies".
 Although frequently labeled as an anti-religion song, the song's namesake was not intended to be interpreted literally.
 In an interview with HighWireDaze.com, leading vocalist Cristina Scabbia explained the meaning of the song; the word "heaven" is a metaphor for a "perfect life".
 When the phrase "your heaven's a lie" is used, it is referring to people who try to force their opinions on others.
Comalies is the third studio album by Italian gothic metal band Lacuna Coil, released on 29 October 2002 through Century Media.
 According to lead singer Cristina Scabbia, "[During the album's recording], we had a sort of creative explosion.
 We were working in a coma, sort of like in a different dimension.
 First of all we just wanted to use the word 'coma' but there was something missing so we played with the two words coma and lies."
 "Comalies" peaked at #178 on the "Billboard" 200 and Peaked at #9 on the Top Heatseekers and Independent Albums charts.
 The outline of the shape from the cover of the band's previous album "Unleashed Memories" (2001) is faintly visible on top of the sunflower.
 The album has gone on to sell over 300,000 copies in the United States as of January 2012.
Cristina Adriana Chiara Scabbia (] ; born 6 June 1972) is an Italian singer and lyricist, best known as one of the two vocalists in the Italian Gothic metal band Lacuna Coil.
 She used to write an advice column in the popular rock magazine "Revolver", alongside musician Vinnie Paul.
 Scabbia is featured in a Megadeth song "À Tout le Monde (Set Me Free)".
 She also featured on "The Theory of Everything", an album from Arjen Anthony Lucassen's Ayreon project, with which she is cast as the Mother.
 She is also the featured artist in the Apocalyptica song "S.O.S. (Anything But Love)" and another version of the Alter Bridge song "Watch Over You".
 Her highest note ever hit is claimed to be an A7.
 Scabbia performed a duet with the Italian ex-singer of Linea 77 Emiliano Audisio on the track "Beautiful Lie" to be part of the soundtrack for the 2013 Italian film "Passione sinistra".
"Watch Over You" is a song by American hard rock band Alter Bridge.
 Written by lead guitarist Mark Tremonti and lead vocalist Myles Kennedy, it was produced by Michael "Elvis" Baskette and featured on the band's 2007 second studio album "Blackbird".
 The track was released as the second single from the album on January 14, 2008, peaking at number 19 on the US "Billboard" Mainstream Rock Songs chart.
 An alternate version of the track featuring additional vocals by Lacuna Coil singer Cristina Scabbia was also later made available as a digital download.
Dieci stratagemmi (Italian: "Ten Stratagems") is an album by Franco Battiato.
 It was released in fall of 2004 by Sony Music, and features musicians like the Krisma and Lacuna Coil's female singer Cristina Scabbia.
Future is the ninth studio album of the music project Schiller created by the German electronic musician Christopher von Deylen.
 The album was released on  26, 2016 (2016--) .
 On this album Schiller has collaborated with the singers Kêta, Arlissa, Emma Hewitt, Samu Haber, Sheppard Solomon, Maggie Szabo, Cristina Scabbia and Tawgs Salter and with Sharon Stone, who wrote the lyrics of "For You".
 The album reached in its first week number 1 of the German albums chart.
 This is Schiller's fifth number-1-album in Germany.
"À Tout le Monde" is a song by American heavy metal band Megadeth, featured on their 1994 studio album "Youthanasia".
 It was released as a single on February 1995 through Capitol Records.
 The song was later remade and reissued as "À Tout le Monde (Set Me Free)", featuring Cristina Scabbia of Lacuna Coil, on Megadeth's 2007 studio album "United Abominations".