Without taking the other retailers into account, I think that as long as Mariah's #1 on iTunes and Madonna's second version is below #30, MC will be
fine. Why? Because I believe the gap between #1 and #2 is at least 20k, and songs below #30 sell around 20k. In addition, Mariah has the airplay lead which
plays a big part right now. So Madonna's #2 placement doesn't bother me, it's her 2nd version I'd like to get updates on... and.. once a day
will do 