Shirley Sparks Swing Band concert at Jazzgalleria, Pori on December 2nd 2017.'Summertime' written by George Gershwin and DuBose Heyward in 1934 for the 1935 opera Porgy and Bess.Shirley Sparks, vocalsAnders Östling, guitarJouni Hokkanen, double bassZoltán Kárpáti, drums