Hotel staff from multiple tour stops have confirmed that Gaga is anything but high maintenance. She constantly goes out of her way to thank the staff and even write notes to them and leave flowers.
I would say Gaga, simply because of how generous she is. I mean, she gave that Pig Perez Hilton a custom motorcycle and he was as fake as they came. Imagine what she would give me, a true, genuine friend.
I couldn't be Katy's friend because I don't support people who eat at homophobic establishments like Chick-Fil-A.