So I did some calculations,
The AI are already out:
Need You Now: 129 Points
BedRock: 115 Points
Rude Boy: 74 Points.
Digital Figures haven't been released yet, so assuming that:
Rude Boy Maintains it #2 spot, selling 160k copies this week, and BedRock selling 90k, and Need You Now selling 130k copies at #6. It sums up:
Need You Now: 259 Points.
Rude Boy: 234 Points.
Difference: 25 Points. Let's hope that Need You Now sells less than 130k copies, and Rude Boy more than 160k, then the #1 spot is for Rude Boy

but it's unlikely so...