"We R Who We R" is still increasing, as indicated by the growing gap between it and "Like A G6". That's the most important thing right now if she's looking for a #1 debut.
44 - 3,436,702 - USHER FEAT. WILL.I.AM OMG
82 - 2,809,627 - USHER FEAT. LUDACRIS & LIL JON YEAH
112 - 2,469,550 - USHER FEAT. YOUNG JEEZY LOVE IN THIS CLUB
Rihanan can still get that number 1 on Hot 100. She doesnt have to reach Itunes #1. she only has to be ahead of Like A G6 cause their airplay is basicly the same (and only girl will most likely go ahead of Like a G6 in a few days).
She doesn't need to be #1 on iTunes, but she needs to do better than "G6". Only way she goes #1 is if the SNL performances boost her sales drastically, but I doubt it. "Whats My Name" is more likely to go #1 later though. Better song.