The Grammy-winning artist kicked it all off when he tweeted that he would be arriving at the railway station via the Eurostar and asking if they still had a piano.
After arriving at the station, the singer proceeded to play a 10-minute set of some of his biggest hits including "Ordinary People" and "All of Me." Live Nation UK posted video of Legend's arrival and performance.
Legend is kicking off a world tour in Miami in May which will be coming to London in September.