No Doubt lead singer and solo artist Gwen Stefani.

Credit: NBC / Trae Patton

THE VOICE -- "Battle Rounds" -- Pictured: (l-r) Adam Levine, Pharrell Williams, Blake Shelton, Gwen Stefani

Credit: AP / John Shearer

Gwen Stefani, left, and Adam Levine perform at the 57th annual Grammy Awards on Sunday, Feb. 8, 2015, in Los Angeles.

Credit: Getty Images / Tim Whitby

Drummer Adrian Young, left, bassist Tony Kanal, singer Gwen Stefani and guitarist Tom Dumont of No Doubt attend the MTV EMA's 2012 at Festhalle Frankfurt on Nov. 11, 2012, in Frankfurt am Main, Germany.

Credit: Getty Images / Andrew H. Walker

Designer and singer Gwen Stefani poses at the L.A.M.B Fall 2010 Fashion Presentation during Mercedes-Benz Fashion Week at Milk Studios on Feb. 11, 2010 in New York City.

Credit: Newsday / Ana P. Gutierrez

Gwen Stefani performs with No Doubt at the Nikon Jones Beach Theater in Wantagh on Saturday, June 27, 2009.

Credit: AP / Adam Butler

Gwen Stefani arrives at the 25th annual Brits Music Awards in London, Wednesday, Feb. 9, 2005. Stefani changes stages in September as her L.A.M.B. fashion collection makes its New York Fashion Week debut.

Credit: VNU / Andrew Cooper

Gwen Stefani as Jean Harlow and Leonardo DiCaprio as Howard Hughes in "The Aviator."

Credit: Los Angeles Times / Al Seib

No Doubt singer Gwen Stefani launches a solo career. She's also started her own fashion line and has become a pop icon in the last decade. (Oct. 1, 2004)

Credit: AP / Kim D. Johnson

No Doubt lead singer Gwen Stefani performs "Bathwater" at the "My VH1 Music Awards," Nov. 30, 2000, in Los Angeles.

Credit: BPI / Chris Cuffaro

The musical group No Doubt: From left, Tom Dumont, Adrian Young, Gwen Stefani and Tony Kandal, photographed in 2000.

Credit: Los Angeles Times / Craig Y. Fujii

Tom Dumont, left, and Gwen Stefani of No Doubt, a band that is among the leading purveyors of the Jamaican-influenced ska movement. (Aug. 11, 1997)

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