Former Beatle Paul McCartney performed a flash concert in New York's Times Square Thursday, sparking a Twitter frenzy by announcing the free gig at an hour's notice.
Sir Paul McCartney performs at Times Square on October 10, 2013 in New York City
"Wow! Really excited to be playing New York Times Square at 1pm this afternoon!" he wrote to his 1.6 million followers in a message retweeted more than 540 times.