Why do I keep dreaming about random celebrities

Last night I dreamed that some girl I knew in high school and Michael Phelps were heading up to Dallas for Easter. For some reason I had the impression that I was invited to come along, but after helping them load tons of luggage into an SUV they said, ok, well bye! See you Monday! I was like, but? I thought you guys asked me over here because I was invited to come along? Then I got all teary eyed and Michael Phelps rolled his eyes at me like I was just trying to guilt trip them or something, but I was actually very confused. I said...but I've already got my bag packed. You saw me come in with it! But they waited till after I loaded up their truck to tell me I couldn't come along. Well fuck you, too, Phelps and random person from high school!

I also dreamed that I was on the Oxford rowboat team thingy that rows against Cambridge. Our team was afraid we'd get disqualified because our coxswain was deformed. His head was attached to his body backwards which gave us an advantage, he could act as coxswain and row at the same time. We lost the race anyway.

I also had some dream about Cicero, where he was giving me advice over dinner about something but I woke up in the middle of it because I had to pee, so I don't remember what he said.