Britney Spears: teaming up with Will.I.Am

Britney is currently recording a song with Will.I.Am. William is a good producer and singer too! But would he just produce or sing in the song? Britney tweeted:

In the studio with @iamwill…you guys are gonna love this one. - Britney

What do you think about this collabo? I think this song is gonna be great!