My brother used to work at the Orange County Convention Center in Florida and could tell you some great stories about wonderful celebrities and celebrities whose minds are beyond the realm of normalicy. I wish he had a Dylan story, but he's never said as such. Now, Diana Ross, heck yeah, she is Ego On A Stick. Surprised they didn't have to knock a wall down so her ego could fit through.
Steve was doing coordinating for her event (setting up chairs/movable walls/setting up her private room/etc), but even though he was a higher up, he always worked along with the regular guys, since he used to do it and wanted his workers to have faith in him ("If the boss can do it, so can we" kind of bonding). And Diana Ross was the Queen of demands. The main one he talks about was the "No one can look at her" clause. So they're setting up the place, and guys about the size of tanks announce Miss Ross is coming through the hall, and to trun around and face the wall and not look at her, which everyone thinks is complete bollocks, until her bodyguards repeat it. Everyone actually had to turn around and face the wall while she walked down the hall. Someone turned around to look, and Miss Ross acted like she was going to be molested, screaming, raising hell and siccing the guard on the guy. (The bodyguard didn't do anything but tell the worker to turn around and stop looking at Miss Ross, but not in a pleasant way.)
Nicest entertainer to appear there was Barry Manilow. He was doing a Christmas show and Steve and the coordinators couldn't find him anywhere. Someone called Steve on the walkie talkie, said Mr. Manilow was at the entrance giving bagels to the people waiting to get in. They figure that means he ordered a delivery to the entrance, so they go to check it out and give it the ok. Turns out that Mr. Manilow was actually at the entrance of the convention center, personally giving people waiting in line bagels. Steve thought the funny part was a good portion of the people coming in to see the show didn't even recognise that it was Barry Manilow himself asking if anyone wanted a bagel while waiting outside.
Barry Manilow is teh coolest, for that alone.