Video: John Legend surprises London fans with mini-concert at a train station

This morning, John Legend decided to throw a surprise performance for commuters at London's St. Pancras Station 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