Very tough to take the Grammy effect into account but I tried
Sales estimates
1. Fun. - We Are Young: 277634
2. Kelly Clarkson - Stronger: 249037
3. ADELE - Set Fire to the Rain: 172051
4. LMFAO - Sexy and I Know It: 154365
5. David Guetta & Nicki Minaj - Turn Me On: 135535
6. Tyga - Rack City: 128771
7. Whitney Houston - I Will Always Love You: 118605
8. Gym Class Heroes - Ass Back Home: 113691
9. Snoop Dogg & Wiz Khalifa - Young, Wild & Free: 113512
10. Madonna - Give Me All Your Luvin': 112402
11. ADELE - Someone Like You: 110067
12. Flo Rida - Good Feeling: 107281
13. Adele - Rolling In the Deep: 102389
14. Gotye - Somebody That I Used to Know: 99562
15. LMFAO - Party Rock Anthem: 97123
16. Drake - The Motto: 90317
17. The Wanted - Glad You Came: 87340
18. Jessie J - Domino: 81833
19. Kanye West & JAY Z - Ni**as in Paris: 77962
20. Rihanna - We Found Love: 77566
21. Pitbull - International Love: 76649
22. Coldplay - Paradise: 72094
23. Drake - Take Care: 71170
24. Christina Perri - A Thousand Years: 69966
25. Big Sean - Dance: 64948
26. Gavin DeGraw - Not Over You: 64100
27. Bruno Mars - It Will Rain: 63281
28. Maroon 5 - Moves Like Jagger: 57946
29. Meek Mill - Ima Boss: 57505
30. Luke Bryan - I Don't Want This Night to End: 54884
31. The Fray - Heartbeat: 54347
32. Toby Keith - Red Solo Cup: 54221
33. Hot Chelle Rae - I Like It Like That: 52904
34. J Cole - Work Out: 50712
35. Lil Wayne - Mirror: 50297
36. Madonna - Like a Prayer: 50114
37. Selena Gomez & The Scene - Love You Like a Lo...: 44922
38. Train - Drive By: 44911
39. Lee Brice - A Woman Like You: 44724
40. Whitney Houston - I Wanna Dance With Somebody: 44110
41. Breathe Carolina - Blackout: 44083
42. Outasight - Tonight Is the Night: 42365
43. Gym Class Heroes - Stereo Hearts: 40716
44. Taylor Swift - Ours: 40609
45. Katy Perry - The One That Got Away: 39250
46. Flo Rida - Wild Ones: 39232
47. Rihanna - You Da One: 37624
48. Foster the People - Pumped Up Kicks: 37570
49. Nicki Minaj - Super Bass: 35900
50. Whitney Houston - Greatest Love of All: 35775
Hot 100 prediction
1-2. Stronger (249 + 84 = 333)
1-2. Set Fire To The Rain (172 + 147 = 321)
3. We Are Young (278)
4. Good Feeling (107 + 117 = 224)
5-6. Turn Me On (136 + 77 = 213)
5-6. Sexy And I Know It (154 + 56 = 210)
7. We Found Love (78 + 128 = 206)
8. Rack City (129 + 56 = 185)
9. Young, Wild & Free (114 + 63 = 177)
10-13. Domino (82 + 86 = 168)
10-13. Ass Back Home (114 + 51 = 165)
10-13. It Will Rain (63 + 102 = 165)
10-13. Someone Like You (110 + 54 = 164)
14. The Motto (90 + 67 = 157)