Videos have emerged online of a secret show performed by One Direction's Niall Horan and Liam Payne in a shopping centre.

As previously reported, the duo played an unannounced set at London's Westfield shopping centre yesterday (August 2), much to the surprise of passing fans.

Social networking website Twitter was ablaze with talk and pictures of the performance, which saw the One Direction pair perform live with a small backing band, with Horan playing acoustic guitar.

Video footage has now emerged online of the secret show, which sees bemused shoppers travel down an escalator behind the global singing stars.

As previously reported, Spandau Ballet singer Tony Hadley revealed that he feels One Direction should have closed last month's London 2012 Olympic Games opening ceremony instead of Sir Paul McCartney.