“That whole time period was just a really hard time.

I feel that record was where No Doubt was most confused.

So many things had happened and then we tried to write that record.”

Gwen Stefani and Tony Kanal of No Doubt performs at Fair Grounds Race Course on May 1, 2015 in New Orleans, Louisiana.

Gwen Stefani performs with No Doubt.Jeff Kravitz/FilmMagic

It was a lot.

That was a struggle, that record.

But I’m happy that someone listened to it."

Preceded by the single “Settle Down,” it debuted at No.

3 on the U.S. charts.

“I have no idea what the future is with the band,” she told the host.

Outside her work with No Doubt, Stefani released three successful solo albums, including 2004’sLove.

which contained her No.

1 single “Hollaback Girl” and its 2006 follow-up,The Sweet Escape.

1 album on theBillboard200.

18 on theBillboardHot 100.

Stefani’s “True Babe” drops June 23 as the lead single from her forthcoming album.