Robert Stigwood managed which famous musical group?

Robert Colin Stigwood (16 April 1934 – 4 January 2016) was an Australian-born British-resident music entrepreneur, film producer and impresario, best known for managing Cream and the Bee Gees, theatrical productions like "Hair" and "Jesus Christ Superstar", and film productions including the successful "Grease" and "Saturday Night Fever".

The Bee Gees were a music group formed in 1958, featuring 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 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 and have been regarded as one of the most important and influential acts in pop music history.