Superbowl half time show

As the million dollar ads rolled on toward the end of the Super Bowl this year, I found my self wondering who picked Tom Petty to play the time show. I enjoyed it, and i felt it was a good choice, but who and how did they come up with him? So I did a bit of research, and unfortuneatly I havn't found the answer yet. Maybe someday I'll call the NFL and ask. Until then I'm forced to wonder.