This video posted on Youtube - and shot by Will Smith himself - shows school-girls in Lambeth going wild for their Hollywood visitor.
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Leicester are Premier League champions after Tottenham conceded a two-goal lead in a bad-tempered 2-2 draw at Chelsea.
Karl, 17, was stabbed to death when his friends became involved in a row with around a gang of youths in Hackney, east London in 2004.
A new living block has opened in Willesden designed for Londoners who want to live 'collectively'.