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

The Fleur de Lys (initially Les Fleur de Lys ["sic"]) were a British band originally formed in late 1964, in Southampton, Hampshire, England.  They recorded singles beginning in 1965 in the transitional Beat to psychedelic music genre, later known as freakbeat.  The band had varied line-ups; only drummer Keith Guster was a member throughout their history.  They finally disbanded in 1969.  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, .  Bassist Gordon Haskell would eventually replace Greg Lake in King Crimson before going on a successful solo career.  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.  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>  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".  During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album "Love. Gwen Renée Stefani ( ; born October 3, 1969) is an American singer, songwriter, fashion designer, actress, and television personality.  Angel.  Music.  Baby. " Inspired by pop music from the 1980s, the album was met with both critical and commercial success.  It spawned three commercially successful singles: "What You Waiting For? ", "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.  In 2006 Stefani released her second studio album "The Sweet Escape".  The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape".  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. <SEP> Scarchives Vol.  1 is a CD and DVD digi-pak compilation from the Finnish band Lordi, released on 3 September 2012.  The compilation contains rare archive materials from Lordi, and was released to celebrate the 20 year anniversary of the band.  The CD contains a previously unreleased studio album recorded in 1997, "Bend Over And Pray The Lord".  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 .  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.  The DVD was edited by Lordi's former drummer, Tonmi "Otus" Lillman. <SEP>  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.  The singer expressed gratitude towards Furler for helping her create the composition. "Start a War" is an unreleased song recorded by American singer Gwen Stefani.  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.  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.