Wow. impressive. just saw this on Wikipedia. Que Sera is the longest-running Australian number one single since the ARIA Charts began
For the week commencing 12 May 2014, "Que Sera" debuted at number one on the ARIA Singles Chart.[4] It remained atop the chart for nine consecutive weeks, making it the longest-running Australian number one single since the ARIA Charts began.[5] The song was certified triple platinum by the Australian Recording Industry Association for selling over 210,000 copies.[