Well this is something you don't see everyday, Coldplay played on cowbells!
So Chris Martin (from Coldplay) was performing Viva La Vida on stage at the all-star cancer benefit Best Night of Your Life when he was joined onstage by comedian Will Ferrell, playing a cowbell!
Yes you heard right, a cowbell!
The recent performance had the crowd in stiches as the 2 ended up in an acoustic guitar-cowbell showdown.
Other performances included Chris covering one of Pink Floyd's songs.
Will Ferrell actually was the one who organised the star studded event.
For more on the story, click HERE