On his website, he has a question and answer section. You can submit your own questions to it. It has a list of questions not to bother asking to save time. The list is as follows:
When are you coming to (YOUR CITY NAME HERE)?
When’s the next album coming out, and what’s going to be on it?
How do you come up with all those crazy, wacky lyrics?
Would you like to hear my incredibly lame idea for a song parody?