It's just that the iTunes Store charts don't show explicit versions for some reason. Kworb and, more specifically, LivePopBars are more accurate for getting instant positions of (all) songs.
Woo looks like I just crossed 200 posts in here then.
And #7! Slay, my favourite number! I must admit, I'm surprised that I have that many posts in here. I don't think I posted much in here early on. I should be in the Top 3 truthfully though, it's my fave Katy song.
It says 84 on my computer but 97 on my phone. 
It's such an amazing bop.