The Beatles' fifth UK single was an instant smash, with pre-orders of more than a million copies.
Within a week of its release, I Want To Hold Your Hand had reached the number one spot in the singles chart, displacing She Loves You. At that point The Beatles held numbers one and two in both the album and singles chart.
More significantly, the success of I Want To Hold Your Hand proved to doubters that The Beatles were no flash in the pan. It finally made America sit up and listen, paving the way for the British invasion of 1964.