By Chris Michaud NEW YORK (Reuters) - Justin Timberlake won big on Sunday at MTV's annual Video Music Awards, taking home the top prize for video of the year for "Mirrors" and a special achievement honor, and also led a much-anticipated onstage reunion of the boy band 'N Sync. Hip-hop artists Macklemore & Ryan Lewis, Taylor Swift and Bruno Mars were among other top winners, with Macklemore & Ryan Lewis taking home three awards, including best hip-hop video. ...