Formed in the late '50s by brothers Barry, Robin, and Maurice Gibb, the Bee Gees became one of the most enduring and influential musical acts in history. Amassing critical and commercial success—they've sold over 220 million albums worldwide—they were instrumental in the popularization of disco in the '70s. Everyone from Michael Jackson and Paul McCartney to Ringo Starr and Beyoncé count them as influences. Their soundtrack to Saturday Night Fever remains one of the best selling albums of all time, and is largely responsible for prolonging the disco craze.