British pop music group formed in 1958. Their lineup consisted of brothers Barry, Robin, and Maurice Gibb. The trio were especially successful as a popular music act in the late 1960s and early 1970s, and later as prominent performers of the disco music era in the mid-to-late 1970s. The Bee Gees have sold more than 220 million records worldwide, making them one of the world's best-selling artists of all time. They were inducted into the Rock and Roll Hall of Fame in 1997. Music historian Paul Gambaccini has written that "the Bee Gees are second only to Lennon and McCartney as the most successful songwriting unit in British popular music".