No popular music act of the '60s, '70s, '80s, or '90s attracted a more varied audience than the Bee Gees. Beginning in the mid- to late '60s as a Beatlesque ensemble, they quickly developed as songwriters and singers to create a style of their own that carried them from psychedelia to progressive pop. Then, after hitting a popular trough, they reinvented themselves as perhaps the most successful white soul act of all time. What remained a constant throughout their history is their extraordinary singing, rooted in three voices that were appealing individually and melded together perfectly.