Apparently "art" is whatever you say it is, and if some idiots are willing to pay you for it, you're a professional artist. Worked for Banksy. And worse people.
I voted for the garbage cans, but I've gotta say that there's something really funny to me about her saying she's gonna do a cover of "Firework," and then she just starts screaming. (And when you catch the dinky piano in the background hit the chorus and she just keeps screaming, that's something special.)
http://www.hollywood.com/news/Yoko_Ono_F…
As a Katy Perry cover, this is awful. As performance art, it is just as bad.
not that this changes anything...