#12 Canada (+6)
#17 Philippines (+89)
#22 New Zealand (+2)
#29 Australia (=)
#32 United Kingdom (+5)
#45 Ireland (+17)
#47 United States (+9)
#59 Netherlands (+11)
#95 Indonesia (+19)
#97 South Africa (+11)
#113 Germany (+10)
#128 Sweden (+74)
#156 India (NE)
#184 Hong Kong (+121)
#193 Austria (+147)
#258 Denmark (+60)
#276 Norway (NE)
#377 Switzerland (NE)
#395 Turkey (NE)
#12 Canada (+6)
#17 Philippines (+89)
#22 New Zealand (+2)
#29 Australia (=)
#32 United Kingdom (+5)
#45 Ireland (+17)
#47 United States (+9)
#59 Netherlands (+11)
#95 Indonesia (+19)
#97 South Africa (+11)
#113 Germany (+10)
#128 Sweden (+74)
#156 India (NE)
#184 Hong Kong (+121)
#193 Austria (+147)
#258 Denmark (+60)
#276 Norway (NE)
#377 Switzerland (NE)
#395 Turkey (NE)
EDIT: it's actually 12. Katy Perry - Birthday in Canada
This is taking off in Canada I hear this and Dark Horse all the time on the top 40 stations. Canada is usually ahead of the game when it comes to new singles.
Please let this smash, I was meh about it when the album first came out, it just didn't stand out to me, but it's grown to be in my trinity for the album I just love it + the Cash Cash Remix so much.