re: Non-pretentious, "down to earth" Hollywood celebrities

A good friend of mine was at ACL a few years ago. He managed to score backstage passes for Willie Nelson. As he was hanging out in the back he saw Matthew Mcconaughey walk up to the gate and security wouldn't let him in, he didn't have a pass on and they had no idea who he was.
My friend being as sly as he is saw what was going on and stepped in telling security that Matt was with him and it was ok. After a second, they obliged and let Matt in.
He said Matt introduced himself and thanked him for that. When the show was about to start Matt walked up onto the stage and stood at the side. When Willy came on and started playing, Matt calls for my friend and ask him to come up there. Friend goes up on the side of the stage and they and talking, enjoying the music, just having a good time. Well a few songs in Matt is getting all into it and he grabs my friend and drags him right onto the center of the stage and they are standing directly behind Willy dancing and having a good time. They ended up hanging out the rest of the evening and my friend couldn't speak more highly of Matt.