The Beatles performed in London on January 30, 1969, exactly 55 years ago. The band hasn't performed in about two years due to burnout.
The legendary pop stars were in the middle of recording their album "Let It Be" Police officers appeared on the roof in front of the cameras. They demanded that the performance be stopped, as it constituted a disturbance to traffic and 'noise pollution', and gave an order to disconnect the speakers. After finishing the song "Get Back" for the third time, they stopped the show. They have not performed since.