QuizUp
 

It's an app that's been doing the rounds here in the UK for a while, but I don't know how popular it is in the States. Do any of you have it?

For those who don't know what it is, it's basically a two-player multiple choice quiz, but there are lots of categories and subcategories to choose from. Some of the music categories are pretty decent.

I was thinking if any of you actually have it, we could all challenge each other!