Book excerpt: Rocky! Farrah! Carrie! Sonny! Cher! Get out your disco shoes, feather your hair, and tie up your wrap dress: 40 years after the debut of ""Charlie's Angels,"" Rocky Balboa, and film's bloodiest prom queen, People celebrates America's bicentennial year with a special issue jam-packed with photos and throwback fun. Happy 40th to Stevie Wonder's masterpiece, ""Songs in the Key of Life,"" to goofy variety shows from Donny & Marie to the singing Brady Bunch, to Blondie, Taxi Driver, ""The Bionic Woman,"" and to that Saturday morning cartoon classic, ""I'm Just a Bill."" Exclusive interviews, including Jaclyn Smith on the making of Charlie's Angels. Memories from rocker Peter Frampton, Olympic gold medalist Dorothy Hamill, best-selling Interview with the Vampire author Anne Rice and more. The headlines, fashions, trends and inventions (hello, first Apple computer!) that make 1976 a year to remember. Just ask Charo.