Nelly Furtado is another in a long line of musicians that have stepped up to record a song in Simlish. In this case it's Furtado's "Manos Al Aire," which is featured in the latest trailer for the game, watchable above.
It's a little funny they went with this song, since, if you don't speak Spanish, you're not really losing anything in the Simlish translation. Thankfully the music-video style of the trailer makes it pretty easy to follow the Sims-laden storyline. It's a pretty standard boy-meets-girl, girl-fights-mummy kinda story.