Sgt. Pepper's Lonely Hearts Club Band — The Beatles (1967)

Sgt. Pepper's Lonely Hearts Club Band didn't just define 1967—it redefined the album as an artistic statement. With 27 weeks at #1 in the UK and over 32 million copies sold, it outperforms #2 Revolver in both commercial and cultural impact. Its groundbreaking gatefold sleeve and orchestral overdubs established the concept album as rock's highest art form, a benchmark that outsells the typical 1960s album by a factor of 10. Critic Robert Christgau declared it the album that 'changed everything,' and decades of acclaim confirm that verdict.