llan Olsen (born 18 March 1956 in Gr?nholt, Vendsyssel) is a Danish folkrock musician and singer-songwriter. His famous live performances combine his songs with satirical and dryly-tempered anecdotes. The music is delivered either acoustically or with a rock band. 　　From 1983 to 1992 he was part of Dalton, a supergroup trio made of Olsen, Lars Lilholt and Johnny Madsen.