Beatles says he was 'giggling inside' at earlier Covent Garden performance
The Beatles icon performs short show to thousands of fans in the shopping hotspot
The singer will do a similar performance to his surprise show in New York's Times Square
Beatles legend says, 'I wish record stores could stay open forever'
Pearl Jam and Cher also outsell former Beatles legend at Midweek point
Beatles legend sticks up for US popstar following MTV VMAs criticism
The Beatles icon will sign copies of his new album at the shop on Friday (October 18)
Gary Numan, Cults, Pearl Jam, Giggs and Cults also have new albums out today
Meryl Streep and Gary Barlow also appear in the promo