T-Mobile Sing-along: new advert filmed at Trafalgar Square, London

This new advert for T mobile is very cool: T-Mobile Trafalgar Square New Singing Advert 30/4/2009 On 30th April 2009 as a follow-up to their successful Liverpool Street Flash-Mob Dance Advert; T-mobile arranged a large karaoke at Trafalgar Square, London. T-Mobile provided the crowd with microphones and then got them to sing along to a number of tunes; including Britney Spears' "Hit Me Baby One More Time"; The Foundations' "Build Me Up Buttercup" and as shown here; "Hey Jude". We saw the advert tonight for the first time during the "Britain's Got Talent" show. It would have been so cool to be in Trafalgar Square at the time! What do you think of the advert?