Britney Spears 'Comes Alive' In The Studio, Says

'She was like a little kid,' the 'Big Fat Bass' producer recalls to MTV News of giddy, 'giggling' Spears.

When hit the studio with Britney Spears for her Femme Fatale track "Big Fat Bass," the producer and Black Eyed Peas frontman said the singer was completely engrossed in the recording process.

"[I discovered] her love for music. I never seen anyone, like, come alive, full of excitement and giggling and laughing behind the mic," will recalled to MTV News. "She was like a little kid when she was recording the song and it just brought the whole atmosphere, it changed the whole atmosphere when someone really loves music. So it was great working with her."

Spears expressed a similar sentiment about recording her chart-topping album during her recent "I Am the Femme Fatale" MTV special, which featured a cameo by, who was finishing up the party track at the time.

"When you're in the studio, you're just really focused, you're really in your head and in your ears and on the notes," she explains in the show. "And when you're performing, it's more a connection on the outside and more of — like a tiger and more in your body."

Both Brit and will are now industry vets so the BEP singer said he didn't have much advice for the star.

"When someone's excited to go out and just do it, what advice? You don't need no advice. She's just turned on right now. She is [like], 'I like this part right here.' When I say [on the song], 'You all better get ready for the kick drum,' she was already anticipating what she was going to do onstage when that beat broke down," he explained. "Adding that type of perspective ... when we we're recording it, you don't need to give nobody [like Britney] advice."

What's your favorite Femme Fatale track? Tell us in the comments!