Nasty Freestyle has to be the song falling out. It fell on sales and Spotify last week, and has negligible if any airplay. Sugar should fall next week, and Earned It looks likely to too. I would say Hey Mama falls out in two weeks, but that's getting pretty far out there.
15. Watch Me +4
14. You Know You Like It +1
11. Cheerleader +5
10. Sugar -1
09. Honey, I'm Good. +2
08. Hey Mama =
07. Earned It -1
06. Uptown Funk -1
05. Want To Want Me +2
04. Shut Up And Dance =
03. Trap Queen =
02. Bad Blood =
01. See You Again =