The Beatles win a grammy for "Best New Artist of the Year" and have record attendance at Shea Stadium of 55,000. It was 8 years later until a concert had a larger crowd.
Funny fact - I'm the first year of Generation "X" and I always tease my sister who was born in 1964 that she's a "boomer" and I can't relate to her generation. We are the same age for 31 days each year.