SnootySims has an exclusive interview with the band Dexter Freebish. 8 questions were asked.  Make sure you catch the link to see what else the band has to say!

How difficult was it to adapt the song to the language of the Sims?
It’s a lot harder than you think! There is somewhat of a guideline to follow and its not as easy as we thought it would be. It was actually very hysterical watching our singer, Kyle, perform in Simlish and try to keep a straight face. We thought it would be fun to perform the song live in Simlish someday.

read here