The song "Summertime" was written by George Gershwin for the 1935 opera Porgy and Bess. The lyrics are by DuBose Heyward and although not thought to be directly involved, Ira Gershwin gets an official credit. The song soon developed a life of it's own beyond the original opera and has been recorded and adapted into many different styles of music from jazz to opera, rock to regg...