Following the success of T-Mobile's flash-mob dance in Liverpool Street Station, London, they have moved on to their next flash-mob project - a mass sing-along on the streets of London.
On the 26th April, a video on YouTube requested viewers to go to Trafalgar Square on the 30th April to take part in the next T-Mobile event. Four days later, 13,500 people turned up in Trafalgar Square to sing along to Hey Jude.
The first time I saw the video, I had a warm gooey feeling inside. This this doesn't put a smile on your face, nothing will!