The Jackson 5 were in some ways the original 'boy band,' able to dance, sing and play multiple instruments. In 1970 they released their second album on Motown Records, 'ABC'. Its resounding success propelled Michael to the world stage as 'J5' became Motown's biggest act. Here, they rock out with signature moves in London, February 1975. Michael, center, began a solo career on the side in 1979.