Our first of five episodes in a special Janet Jackson theme week of our 'Vintage Pop Stardom' series begins in '86 with key earrings, "Nasty" boys and lots and lots of 'Control.' Janet Jackson pictured on November 6, 1986. Christian Rose/Roger Viollet via Getty Images Trending on Billboard In honor of her upcoming 60th birthday this Saturday (May 16), we’re doing a full week of Vintage Pop Stardom deep dives into the all-time greatness off Janet Jackson on the Greatest Pop Stars podcast. Each day this week (May 11-15), we’ll look at a different peak year in Janet Jackson’s singular career — 1986, 1990, 1993, 1998 and 2001 — and hit on all the albums, singles, videos, dance routines, tours, performances, fashion statements, social and political statements, and other big moments that made Ms. Jackson’s contributions to the music and culture of those years absolutely unforgettable.…