Attention Charlie Puth
You're going to need a little bit of luck for this one. All the best!
Capital's Jingle Bell Ball is the biggest weekend of music where stars descend from every corner of the world to perform at. So we've had a lot of chances to think up some very HARD questions for you.
Let us know exactly how you get on...we told you it wouldn't be easy didn't we!
We've got a feeling you're going to want to give it another try. Well, we suggest you have a look around the site for some clues!
Justin Bieber - 'Sorry' (Live At The Jingle Bell Ball 2015)