During their first night of a six night sold-out residency One Direction smashed all social media records for The O2.
A staggering 1.3 million people were reached on Twitter alone with nearly 800,000 seeing a selfie the boys posted before they went on stage.
Niall, Louis, Liam and Harry used the world's first venue based 'Twitter Mirror' to post instantly to all their fans following them and their gig at The O2.
Speaking about the performance at the iconic venue Liam described it as:
"My favourite venue to play at".
Thousands of fans descended on The O2 from lunch time on, overwhelming all social channels, packing restaurants and snapping up One Direction merchandise.
Rebecca Kane Burton General Manager of The O2 said "It was an amazing first night and we know the Directioners loved it. We've never seen such engagement on social media and the buzz online and in the venue was something special."