Final answer:
The 'British Invasion' in the 1960s, led by bands like The Beatles and The Rolling Stones, transformed the American music industry and popularized rock music.
Explanation:
The 'British Invasion' had a significant impact on the American music industry during the 1960s. British rock groups like The Beatles and The Rolling Stones became extraordinarily popular in the United States, transforming rock and roll into the all-encompassing genre of rock. Their influence led to a diversification of musical styles and instruments used in rock performances and recordings.
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