Question: What was an unreleased song created by a female artist who left a band and started a solo career in 2004?

<P0-S0>  Originally intended for inclusion on her then-upcoming and untitled third studio album, the ballad was written by Stefani and Sia Furler, with Arnthor Birgisson as executive producer. <P0-S1>  The singer expressed gratitude towards Furler for helping her create the composition. <P0-S2>  The song was initially meant to serve as a bonus track on a CD maxi single for her 2014 single "Baby Don't Lie", although the distribution was scrapped by Interscope and Mad Love Records. <P0-S3> "Start a War" is an unreleased song recorded by American singer Gwen Stefani. <P0-S4>  After being registered with a UPC, it was then revealed on Universal Music Group's official website that it would be issued as a standalone digital download on November 9, 2015, which was also cancelled. <SEP> <P1-S0> The Fleur de Lys (initially Les Fleur de Lys ["sic"]) were a British band originally formed in late 1964, in Southampton, Hampshire, England. <P1-S1>  They recorded singles beginning in 1965 in the transitional Beat to psychedelic music genre, later known as freakbeat. <P1-S2>  The band had varied line-ups; only drummer Keith Guster was a member throughout their history. <P1-S3>  They finally disbanded in 1969. <P1-S4>  Keyboardist Pete Sears went on to play with Sam Gopal Dream, and recorded on four early Rod Stewart albums including "Every Picture Tells a Story", and was a founding member of Jefferson Starship, going on to playing with Hot Tuna for ten years, and working with artists like John Lee Hooker, Dr. John, and Harvey Mandel, . <P1-S5>  Bassist Gordon Haskell would eventually replace Greg Lake in King Crimson before going on a successful solo career. <P1-S6>  Guitarist Bryn Haworth would move to the States and record an unreleased album under the name Wolfgang with a band including acclaimed bassist Leland Sklar. <P1-S7>  He would record solo albums in the 1970s for Island Records and A&M Records, before continuing his solo career on Contemporary Christian Music labels. <SEP> <P2-S0> Scarchives Vol. <P2-S1>  1 is a CD and DVD digi-pak compilation from the Finnish band Lordi, released on 3 September 2012. <P2-S2>  The compilation contains rare archive materials from Lordi, and was released to celebrate the 20 year anniversary of the band. <P2-S3>  The CD contains a previously unreleased studio album recorded in 1997, "Bend Over And Pray The Lord". <P2-S4>  The original version of the song, "Get Heavy" (recorded in 1997), and a previously unreleased song entitled "Hulking Dynamo" (from the "Get Heavy" recording sessions in 2002) are included as a bonus track . <P2-S5>  The DVD includes a gallery of unreleased songs from 2002; as well as the full video from Lordi's first concert (in Helsinki, 2002), which has an audio commentary by Mr. Lordi. <P2-S6>  The DVD was edited by Lordi's former drummer, Tonmi "Otus" Lillman. <SEP> <P3-S0>  She is a co-founder and the lead vocalist of the band No Doubt that experienced major success after their breakthrough studio album "Tragic Kingdom" (1995) along with various successful singles, including "Just a Girl", "Don't Speak", "Hey Baby", and "It's My Life". <P3-S1>  During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album "Love. <P3-S2>  Angel. <P3-S3>  Music. <P3-S4>  Baby. <P3-S5> " Inspired by pop music from the 1980s, the album was met with both critical and commercial success. <P3-S6>  It spawned three commercially successful singles: "What You Waiting For? <P3-S7> ", "Rich Girl", and "Hollaback Girl", the latter reached number one on the "Billboard" Hot 100 while also becoming the first US download to sell one million copies. <P3-S8>  In 2006 Stefani released her second studio album "The Sweet Escape". <P3-S9>  The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape". <P3-S10>  Her third solo album "This Is What the Truth Feels Like" was released in March 2016 and became her first solo number-one album on the "Billboard" 200. <P3-S11> Gwen Renée Stefani ( ; born October 3, 1969) is an American singer, songwriter, fashion designer, actress, and television personality.