Smith sings hits at I, Robot premiere

Will Smith thrilled 3,000 fans who had turned out for the UK premiere of his latest film - by singing to them. The 'I, Robot' star stunned the crowd in London's Leicester Square last night by taking to the stage and performing a string of his rap hits with musical partner, DJ Jazzy Jeff. He confessed: "I can't believe the reaction. I love this city and I love Britain." The sexy star, who also produced his latest movie, spent an hour mingling with fans who had turned out for the film's preview screening. The movie, which sees the 'Fresh Prince' star fighting off robots that are trying to take over the world, has already topped the box office in the US, knocking rival summer blockbuster, 'Spider-Man 2' off the top spot. Other guests at the event, hosted by George Clooney's girlfriend, Lisa Snowdon, included boy band 'Busted' and 'Baywatch' star, David Hasselhoff, a close friend of the 'Men in Black' actor. Earlier this week the 'Independence Day' star revealed that he was attending the London premiere alone while wife Jada promotes her new film in New York. He said: 'This is very exciting. People seem to be looking forward to it. I hope they are excited by the movie"