Doesn't matter what hour you release your song, if people don't want to buy it, if you don't have the fans, it won't do well. There are factors that can certainly contribute to her success, but at the end of the day it all comes down to her and her music.
i'm just saying the true...
i accept she broke the record, but i'm saying the reason...
You do know the song went number one in all 23 countries that have an iTunes store, right? You know there is this bizarre thing called time zones....... I don't know if you've heard of them, but maybe you should look them up.