This took place on Saturday and is another of the random videos being put together as commercials for T-Mobile. This is what they had to say:
The exclusive 4 minute extended version of the moment 13,500 people spontaneously sang Hey Jude together in Trafalgar Square. Everyone involved arrived thinking they could be dancing - no-one had any idea how the event would unfold.
Regardless, pretty cool. Yes, that is Pink in the crowd as she performed this weekend at the o2 arena.-Dr.FB