In the summer of 1979, 16-year-old French Canadian singer France Joli stepped onto a stage on Fire Island as a last-minute replacement for Donna Summer. She had no idea what she was walking into. The crowd was filled with thousands of gay men gathered for a legendary beach concert known as Beach '79, and Joli was about to perform her debut single, "Come to Me," for the very first time in the United States. "I was brought to Fire Island. I had no…