How many famous musicians can they fit in one song?
It's about that time of the year again.
The time when Sir Bob Geldof gathers all his British and Irish musician friends together and gets them to sing for the world's problems.
Trying to replicate the first Band Aid performed nearly 30 years ago, this year's super group consists of some of the world's most famous musical faces singing "Do they know it's Christmas?"
Every year the group sing to bring awareness and raise funds for a specific world problem. This year that problem is Ebola.
The video for the song has some pretty disturbing visuals of Ebola victims before cutting to some of the groups members arriving for the songs recording. It ends with the large group singing in unison.
We don't want to spoil the surprise of who exactly is in the group, so we'll just let you watch the video and see how many of your favourite artists you can spot: