I love this song. I love the cup dancing too. I know sometimes it could get annoying to some. I prefer Anna's version in the movie though. Simpler and more heartfelt for me.
I guess I have a thing for that. Speaking of which, I think you guys should check this out! Search for Cup Song [Juggling Edition], Niels Duinker - Imitation Pitch Perfect's "When I'm Gone" in youtube.
I found this video online and I think this is pretty amazing. It's pretty short and could honestly benefit a few tricks and smooth moves, but I think this is a really cool version of the cup dance. This time the artist combined juggling into the original choreo and came up with his version, which I think is pretty amazing.
Let me know what you guys think.