Picadilly Circus in central London is particularly known for its video display and neon signs. John Lennon's widow Yoko Ono has hired out a central London spot to spread her message of world peace. The poster reads simply "Imagine all the people living life in peace" - a lyric from Lennon's chart-topper and paean to non-violence, Imagine. The artist and performer is believed to have paid GBP 150,000 for a giant billboard space amid the flashing neon signs of Piccadilly Circus. With PhotoFunia you can do it for free.