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Gwen Stefani And Pharrell Heat Things Up With New Track ‘Spark The Fire’

We need to hear more!

Break out your lighters. Gwen Stefani is ready to "Spark The Fire."

Coming on the heels of her brand-new single, "Baby Don't Lie," the No Doubt frontwoman teased us with another song, "Spark The Fire," and it's seriously hot.

Gwen stopped by AMP radio to catch up with "The Voice" host Carson Daly, and gave fans a sneak peek of the song, which has the singer going back to her roots.

Gwen starts off the song with a slow-tempo sound, before asking, "Are you guys ready?" From there, the song erupts into an explosive beat. "Who got the lighter?/ Let's spark the fire," she sings before showing off some rap skills.

The song was produced by fellow "Voice" mentor and longtime collaborator Pharrell, who also worked on two other songs with Gwen, "Woah" and "Heart Shape." Yet, as Gwen explained, finishing this song wasn't so easy; their schedules were pulling them in several different directions.

"He's like, 'I've got to play you this. I have to play you this,'" she said of the track's formation. "And so he plays me this song, and it's like magic. All it was was a beat and he was singing this melody on top and I just knew, that's it. That night, after shooting all day, we went in the studio all night long, stayed up till 4 in the morning, came back, got on set and then didn't finish."

She continued, "Then I met him in New York at my fashion show after working all week, and again, we went into the studio all night long, didn't finish, but had these incredible songs coming out, so he came off of tour from Europe, met me in Miami, and we finished the song."

And get this: Gwen did confirm that even though she was just planning on doing "a couple songs," there are now enough songs for a record, her first since 2006′s Sweet Escape, but she is "still working" on it.