For the past 50 years, the Beach Boys have lived one long, endless summer. “America’s Band” was founded in Hawthorne, Calif., in 1961, where the Wilson brothers—Brian, Carl, and Dennis—first practiced their surf-culture harmonies. Their 1966 masterpiece, Pet Sounds, pushed the Beatles to expand their musical boundaries—they answered with Sgt. Pepper’s Lonely Hearts Club Band—and Katy Perry would never have written “California Gurls” if the Beach Boys hadn’t dreamed of them first. To commemorate the band’s golden anniversary, in November the Beach Boys will finally release The Smile Sessions, the legendary album they recorded in 1966 and 1967 but have withheld for decades.