This will hit #1. It's Top 100 on iTunes without adds date, much pre-adds date radio support, discount, remix, etc. It's still got plenty of time to smash. The video has done wonders for thi song! (well, the exposure of it... the song itself is what's making people buy it because it's flawless).
EDIT: BTW this song is what made Katy Perry my second fave over another pop star, who is now my third fave. It's also my favourite Katy single and song ever.
It literally is my 2nd most played song on my iphone right now only behind Britney's Showdown but that was from 2003...also i reset plays on alot of britney songs so it would really be 10 but nonetheless its still #2 with 355 plays.
Same! Original stans unite! (I stanned for all of my four main faves since their debut (major label release) singles... TiK ToK, I Kissed A Girl, Just Dance and Pon De Replay.