Göran Bertil Lagerberg (Swedish pronunciation: [ˈjœ̂ːran bærtɪɭ lɑːgɛrbɛrj']; born 20 September 1947) is a Swedish musician and singer-songwriter, best known as the bass guitarist and co-lead vocalist in Swedish rock band Tages and later progressive rock act Kebnekajse. In the 1990s, he was a member of supergroup Grymlings together with Magnus Lindberg, Pugh Rogefeldt and Mikael Rickfors. Lagerberg initially joined Tages in 1963 when they were named Alberts Skiffelgrupp and played washboard. The group quickly abandoned their skiffle roots in favour of beat music, with Lagerberg picking up bass guitar. Upon becoming a professional band in 1964, Lagerberg competed with lead singer Tommy Blom as the group's de facto leader. Starting in 1966, he composed a huge output of the group's music, penning most original songs they recorded. Lagerberg was the group's only consistent member and stayed with them until 1970 when they had changed their name to Blond. The group has repeatedly been cited as one of the best Swedish groups of the 1960s due to their later work including the studio album Studio (1967). After a brief stint as a session musician, Lagerberg joined progressive rock band Kebnekajse, playing on two of the group's studio albums, Kebnekajse II and Kebnekajse III, but did not write songs for these. He left in 1975 for further studies. In 1990, Lagerberg co-founded Grymlings, who became both commercially and critically popular in Sweden. All three of their albums reached the top-twenty on Sverigetopplistan. He has also collaborated with several other Swedish artists, including Fläsket brinner, Egba, Feta Heta linjen and has participated in several re-unions of Tages.