Dave Grohl and Rick Astley surprise a London crowd

Dave Grohl 2014

What a moment

When the NME put on a gig in London with the words "Special Guest" on the side of the poster, no one could have guessed it be Dave Grohl.

Dave put on a show to the packed nightclub as those insides couldn't believe their luck. 

Things then got even better when Dave brought out the one and only Rick Astley...