Question: What season of The Voice did the lead vocalist of No Doubt appear on?

Context paragraphs:
Adam Latiff: Adam Latiff (born March 24, 1979) is a lead guitarist, rhythm guitarist, songwriter, and vocalist for a number bands, most notable for Puddle of Mudd.  He started his career in bands such as Devereux and was a touring guitar player for Eve to Adam until December 2014.  Latiff is the lead vocalist and lead guitarist for a national Nirvana tribute band called Heart Shaped Box, and is also the lead vocalist for Vanilla Women, which features former members of Shinedown Cold and Puddle of Mudd.

Jeffery Austin: Jeffery Austin McClelland, Jr. (born April 15, 1991), better known by his stage name Jeffery Austin, is an American pop musician and was a contestant on the ninth season of The Voice, turning a single chair and defaulting to be a member of Gwen Stefani's team.  He eventually finished in fourth place, behind Jordan Smith, Emily Ann Roberts, and Barrett Baber.  His compilation album, "The Voice: The Complete Season 9 Collection", placed on the "Billboard" magazine charts.

L.A.M.B.: L.A.M.B. was a fashion line by American singer Gwen Stefani, the lead vocalist of the rock band No Doubt.  The line manufactured apparel and fashion accessories.  It was founded in 2003 and made its runway debut in 2004.  The fashion line manufactured accessories like shoes, watches, bags and a fragrance called "L." The name is an acronym of her debut solo album "Love.  Angel.  Music.  Baby".

Michael Jagmin: Michael "Jag" Jagmin is an American vocalist, notable for being the former lead vocalist of post-hardcore band A Skylit Drive and former lead vocalist of metal band Odd Project.  Jagmin is well known for the idiosyncratic quality of his voice and possesses a wide vocal range spanning over three octaves, and the ability of making high pitched screams.

Fruit (band): Fruit are an indie folk rock band from Adelaide, Australia.  The group was formed in 1995, and consists of Mel Watson (lead vocalist, horn player, songwriter), Susie Keynes (lead vocalist, guitarist, songwriter), Sam Lohs (lead vocalist, acoustic guitarist, songwriter), Yanya Boston (drums, percussion), and Brian Ruiz (Bass guitar).  In 2003 they won the "Best Live Album" award at the Australian Live Music Awards.  Their most recent album is Burn, which was released in June 2005.

Mike Mattison: Mike Mattison is an American musician and vocalist of the Grammy Award-winning blues rock/soul group, the Tedeschi Trucks Band, as well as lead vocalist and co-founder of the blues rock trio Scrapomatic.  Mattison's vocal sound has been described as "strong," with an "expressive blues voice".  As lead vocalist of Scrapomatic, he picked up a nomination for Minnesota Music Awards best male vocalist, and both he and co-founder Paul Olsen were also nominated for best R&B Group.  Mattison was previously the lead vocalist of the Grammy Award winning Derek Trucks Band and has been a main songwriter of all three bands.  He is also an active essayist who publishes on music and poetry.  Since 2013 Mattison and Ernest Suarez have edited “Hot Rocks: Songs and Verse,” an ongoing feature in Five Points: A Journal of Literature and Art.

Craig Mabbitt: Craig Edward Mabbitt (born April 9, 1987) is an American singer-songwriter and recording artist.  He is the lead vocalist for American rock band Escape the Fate.  He was formerly the lead vocalist for the bands Blessthefall and The Word Alive.  He is also the current lead vocalist of a side-project band, The Dead Rabbitts, along with Escape the Fate's rhythm guitarist, TJ Bell.

Gwen Stefani: Gwen Renée Stefani ( ; born October 3, 1969) is an American singer, songwriter, fashion designer, actress, and television personality.  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.  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.

Teenage Time Killers: Teenage Time Killers is a rock supergroup formed in February 2014 by My Ruin guitarist Mick Murphy and Corrosion of Conformity drummer Reed Mullin.  Guests include Dave Grohl (former drummer of Nirvana and current lead singer of the Foo Fighters), Stephen O'Malley (of Sunn O))) and Burning Witch), Corey Taylor (lead vocalist of Slipknot and founder of Stone Sour), Nick Oliveri (former bassist for Queens of the Stone Age, currently with The Dwarves), Jello Biafra (former front man of Dead Kennedys, currently with The Guantanamo School Of Medicine), Matt Skiba (vocalist and guitarist of Alkaline Trio and current guitarist and vocalist for Blink-182) and Randy Blythe (lead vocalist of Lamb of God).  The band's name refers to the Rudimentary Peni song of the same name.  Their debut album, titled "Teenage Time Killers: Greatest Hits Vol.  1", was recorded at Grohl's Studio 606, and was released July 28, 2015.  through Rise Records, with whom the group signed in December 2014.  The album contains a version of John Cleese's poem "Ode to Hannity," sung by Biafra.  Mullin has stated that he isn't sure whether the group will tour, but that they are considering a live appearance on a show such as "Jimmy Kimmel Live! ", possibly with "three or four singers [coming] out at a time".

Brave Giant: Brave Giant are an Irish indie/folk band from County Longford, consisting of Podge Gill (lead vocalist, electric guitar, acoustic guitar), Mark Prunty (lead vocalist, electric guitar, acoustic guitar), Ross McNerney (banjo, mandolin, vocalist), Emmett Collum (drums, vocalist) and David Kilbride (bass, vocalist).

Supporting paragraphs: Jeffery Austin Gwen Stefani
Answer: ninth