Why? Someone was gaming the system, of course: “On Monday, word spread that Post Malone’s ‘Rockstar’ hit No. 1 on the Billboard Hot 100 singles chart. Three years ago Billboard decided to take YouTube plays into account for its Hot 100 ranking system and, through that technicality, a sneaky video of the song’s chorus on repeat with over 40 million views helped push ‘Rockstar’ to No. 1.”