Almost a decade after Maurice White formed the spiritually minded Earth, Wind & Fire, the band hit upon one of their sweatiest, most sensual anthems, "Boogie Wonderland." Featuring alluring lead vocals by female R&B trio The Emotions, this disco stunner remains a surefire dance-floor filler. In a mellower mood, the aching "After the Love Has Gone" is one of Philip Bailey's most enduring ballads, and the slinky "You and I" is an uplifting, joyous love song.