I've counted votes using Instagram and other social media avenues (for punting purposes) at least the last four years now with plenty of joy. From this it's very hard to see Kendrick Lamar and The Rubens not being 1 and 2 respectively. They were about 40% and 20% ahead of Lean On and the two main Tame Impala songs.
In saying that, while social media is usually a good indicator for most of the count there is the odd curve ball, I had 1998 (Chet Faker) an absolute certainty for 3rd last year and it was only about 8th.
If not for 1 and 2 being the wrong way around Instagram data had top 5 in exact order. Special thanks to William Hill, the a-hole of all bookmakers, for having Hoops at $17 for a lonnnnngggg time.