Who sings the song in the mario party DS commercial and what is it called?

I heard the song in the commercial and i LOVED it. it was catchy, and the artist sounded familiar. I think (emphesis on think) the artist is Lady Sovereign... but im not sure.

The artist is Lady Sovereign (excellent guess)!

The song is called "Hoodie." I should warn you, it is marked as Explicit on several song sites, but it IS a good song!