New Zealand Soprano Hayley Westenra, the youngest Unicef ambassador, and member of the Irish group Celtic Woman grins as she arrives in London's Leicester Square for the European Premiere of Sir Michael Caine's latest film, 'Harry Brown' directed by Daniel Barber on November 10, 2009. Described as a 'modern urban western,' the titular Harry Brown (Caine) is an elderly widower and former Royal Marine who has lived to see his South London neighbourhood overrun by violent gangs, drugs and crime.