#1
this week on the Hot 100:
2009: Single Ladies
2010: TiK ToK
2011: Firework
2012: We Found Love
2013: Locked Out of Heaven
2014: The Monster
2015: Blank Space
2016: Hello
2017: Starboy
2018: Perfect
2019: thank u, next
2020/21/22: All I Want For Christmas Is You