It knocked Harry Styles off his feet!
The crowd sang Happy Birthday to Niall Horan as he was presented with a huge cake from the club owners, which was promptly shoved in everyone's faces, Harry Styles fell over, they took their tops off - it goes on! Here are all the vids...
Fancy checking out some videos of the boys? Of course you do, so do we. Let's watch some together, starting off with some questionable quality footage of Na Na Na;
Bit of RiRi?
Click next for more!