premise: The Bee Gees wrote music.
hypothesis: Bee Gees . were a pop music group formed in 1958 . The group sang recognisable three-part tight harmonies ; Robin 's clear vibrato lead vocals were a hallmark of their earlier hits , while Barry 's R&B falsetto became their signature sound during the mid-to-late 1970s and 1980s . The Bee Gees wrote all of their own hits , as well as writing and producing several major hits for other artists . After achieving their first chart success in Australia as the Bee Gees with `` Spicks and Specks '' ( their 12th single ) , they returned to the UK in January 1967 where producer Robert Stigwood began promoting them to a worldwide audience . The Bee Gees have sold more than 220 million records worldwide , making them one of the world 's best-selling music artists of all time .