''I Want You Back'' (1969)
The first single from the Jackson 5's debut album became a massive hit the first of many to come thanks in large part to the band of brothers' pint-sized dynamo of a lead singer, then 11 years old.
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From his first hit with the Jackson 5 to his shocking death today, the King of Pop defined a musical era with a classic catalog of hits -- yet his art in later years would often be overshadowed by controversy and eccentric public behavior