In regards to the Hall & Oates concert we saw on Friday, I'm just going to think that perhaps he was having a bad night, and he's not as "diva-ish" as he seems.
If you need a good laugh, watch this YouTube video of Hall and Oates. I'm pretty sure it's their first song, and the video is hilarious. They couldn't have spent more than $100 on production. Wow, how far we've come in TV.