Our Janet Jackson Vintage Pop Stardom Week continues in 1990, with the pop legend zooming past her 'Control' era and the rest of the pop pack. Janet Jackson poses for a portrait in Los Angeles, California, circa 1990. Bonnie Schiffman/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.…