Katy Perry Part of Me (7 full days) = 411k
Gaga Born this Way (3 full days?) = 448k ----it was release on Friday
fun "We Are Young" (7 full days) this past week that ended 7 days ago = 349,000
In fact, since it was released 13 minutes after the charts for this week charted it means that Boyfriend has been outselling it many times to one each second of this chart week. AKA Boyfriend has sold more copies than We Are Young for this tracking week, which IS all that matters.