Lars Erik ("Lasse") Dahlquist (14 September 1910 in Örgryte (grew also up in Lidingö) – died 14 October 1979 on Brännö, Gothenburg archipelago due to laryngeal cancer) was a Swedish composer, singer and actor. Many of his songs are among the most popular sing-along songs in Sweden, such as Oh boy oh boy oh boy and Gå upp och pröva dina vingar. When he was a child, during the summers he was at his grandfather's farm Langegården on Brännö where he built his own home. He worked at 's music publishment Svenska Noter and 1931 he began recording gramophone records.