"I used to be a server at a Mexican restaurant right outside LA in the late 90s. One day Leonardo DiCaprio came in with who I assume was his mom to have lunch. This would've been post Titanic so really at the peak of his breakthrough mega celeb status. He was wearing a ball cap, sunglasses and unshaven but I recognized him anyway. I didn't let anyone know and I wrote something like "your movies are awesome, I hope you liked our food" on his receipt when I dropped it off at the table.
After he left, I swung by and picked up his payment and he had left me a note back that said "thank you so much for not blowing my cover" with a $100 tip. S@#t was awesome I was only like 19, I went and got some Playstation games with it after my shift ended."
Usher came into another place wearing pajamas and fuzzy slippers, and acted like a little child. He would hide under the table, giggling and kept getting up and dashing to the door and back. Odd dude. Maybe it was drugs...