Ahead of the Darkness And Light tour going on sale this coming Friday, the ten-times GRAMMY-winning John Legend arrived in London yesterday morning for a day of press. But true to form, Mr. Legend made time for a performance - at St. Pancras station!

Here's how it all went down: He stepped off the train, dropped his bag, marched over to Elton John's piano just by the Eurostar terminal and without any warning, pulled out an impromptu three-song set, including a live rendition of his new single 'Surefire'.

Watch the action unfold below!

How could this not get you in the mood for a tour!?

You can see him live in Stockholm at Ericsson Globe, September 26th