Here are some numbers collected by MediaTraffic (a worldwide chart, in case you don't know it). Before you read there's some things you should know:
1. Albums sales are all higher than what they show cause they only keep track on albums and single in the top 40.
2. Singles' numbers are not expressed in pure sales but in points, a mix they make between actual sales and airplay.
3. The singles that appear in this particular chart are the only worldwide-released ones, not europe-onle, us-only, etc.
ALBUMS (Top 25)
01. The Fame (Monster) - Lady Gaga (13,400,000)
02. I Am… Sasha Fierce - Beyoncé (6,030,000)
03. Born This Way - Lady Gaga (5,670,000)
04. Funhouse - P!nk (5,440,000)
05. Loud - Rihanna (5,370,000)
06. Teenage Dream - Katy Perry (5,130,000)
07. Circus - Britney Spears (3,400,000)
08. Hard Candy - Madonna (3,200,000)
09. Greatest Hits!... So Far - P!nk (3,000,000)
10. Talk That Talk - Rihanna (3,000,000)
11. One Of The Boys - Katy Perry (2,800,000)
12. Rated R - Rihanna (2,610,000)
13. 4 - Beyoncé (2,300,000)
14. Animal - Ke$ha (2,100,000)
15. The Truth About Love - P!nk (1,771,000)
*
16. Femme Fatale - Britney Spears (1,500,000)
17. Pink Friday - Nicki Minaj (1,480,000)
18. Celebration - Madonna (1,400,000)
19. Who You Are - Jessie J (1,400,000)
20. MDNA - Madonna (1,320,000)
21. Sale El Sol - Shakira (1,200,000)
22. Pink Friday: Roman Reloaded - Nicki Minaj (1,087,000)
23. Love? - Jennifer Lopez (880,000)
24. Unapologetic - Rihanna (743,000)
*
25. Bionic - Christina Aguilera (610,000)
Albums sold per singer (average):
1. Lady GaGa - 9.5m
2. Beyoncé - 4.1m
3. Katy Perry - 3.9m
4. P!nk - 3.6m
*
5. Rihanna - 2.9m
*
6. Britney Spears - 2.4m
7. Madonna - 2.2m
8. Ke$ha - 2.1m
9. Jessie J - 1.4m
10. Nicki Minaj - 1.3m
11. Jennifer Lopez - 0.8m
11. Shakira - 0.8m
13. Christina Aguilera - 0.4m
* P!nk and Rihanna are expected to chart higher with sales of their recent albums The Truth About Love and Unapologetic
SINGLES (Top 80)
01. Poker Face - Lady Gaga (9.840.000)
02. Tik Tok - Ke$ha (9.491.000)
03. We Found Love - Rihanna (9.246.000)
04. Bad Romance - Lady Gaga (8.874.000)
05. California Gurls - Katy Perry (8.553.000)
06. I Kissed A Girl - Katy Perry (8.454.000)
07. Hot N Cold - Katy Perry (7.995.000)
08. Just Dance - Lady Gaga (7.935.000)
09. Firework - Katy Perry (7.831.000)
10. 4 Minutes - Madonna (7.623.000)
11. Only Girl (In The World) - Rihanna (7.538.000)
12. On The Floor - Jennifer Lopez (7.375.000)
13. So What! - P!nk (7.130.000)
14. Born This Way - Lady Gaga (6.626.000)
15. Telephone - Lady Gaga (5.966.000)
16. Starships - Nicki Minaj (5.864.000)
17. Teenage Dream - Katy Perry (5.819.000)
18. Alejandro - Lady Gaga (5.639.000)
19. Womanizer - Britney Spears (5.518.000)
20. If I Were A Boy - Beyoncé (5.468.000)
21. Raise Your Glass - P!nk (5.304.000)
22. E.T. - Katy Perry (5.298.000)
23. S&M - Rihanna (5.075.000)
24. Halo - Beyoncé (4.722.000)
25. Price Tag - Jessie J (4.721.000)
26. Rude Boy - Rihanna (4.678.000)
27. Paparazzi - Lady Gaga (4.603.000)
28. The Edge Of Glory - Lady Gaga (4.482.000)
29. Last Friday Night - Katy Perry (4.453.000)
30. What's My Name? - Rihanna (4.377.000)
31. We R Who We R - Ke$ha (4.295.000)
32. Single Ladies - Beyoncé (4.244.000)
33. Waka Waka - Shakira (3.840.000)
34. Blow Me (One Last Kiss) - P!nk (3.643.000)
35. ****in' Perfect - P!nk (3.640.000)
36. Super Bass - Nicki Minaj (3.600.000)
37. Wide Awake - Katy Perry (3.526.000)
38. Part Of Me - Katy Perry (3.490.000)
39. Circus - Britney Spears (3.372.000)
40. Till The World Ends - Britney Spears (3.325.000)
41. Diamonds - Rihanna (3.290.000)
42. Where Have You Been - Rihanna (3.287.000)
43. Sweet Dreams - Beyoncé (3.265.000)
44. Your Love Is My Drug - Ke$ha (3.215.000)
45. Russian Roulette - Rihanna (3.183.000)
46. Sober -P!nk (3.145.000)
47. She Wolf - Shakira (3.105.000)
48. The One That Got Away - Katy Perry (3.034.000)
49. Domino - Jessie J (2.899.000)
50. 3 - Britney Spears (2.862.000)
51. Give It 2 Me - Madonna (2.839.000)
52. Please Don't Leave Me - P!nk (2.621.000)
53. LoveGame - Lady Gaga (2.486.000)
54. Celebration - Madonna (2.427.000)
55. Hold It Against Me - Britney Spears (2.386.000)
56. Blah Blah Blah - Ke$ha (2.307.000)
57. Loca - Shakira (2.220.000)
58. Judas - Lady Gaga (2.118.000)
59. Dance Again - Jennifer Lopez (2.117.000)
60. Waking Up In Vegas - Katy Perry (2.114.000)
61. Yoü And I - Lady Gaga (1.942.000)
62. Best Thing I Never Had - Beyoncé (1.884.000)
63. I Wanna Go - Britney Spears (1.851.000)
64. Keeps Gettin' Better - Christina Aguilera (1.831.000)
65. Die Young - Ke$ha (1.715.000)
66. Blow - Ke$ha (1.681.000)
67. California King Bed - Rihanna (1.622.000)
68. Take It Off - Ke$ha (1.444.000)
69. Give Me All Your Luvin' - Madonna (1.434.000)
70. Cheers - Rihanna (1.432.000)
71. If U Seek Amy - Britney Spears (1.297.000)
72. Hard - Rihanna (1.256.000)
73. Pound The Alarm - Nicki Minaj (1.218.000)
74. You Da One - Rihanna (1.217.000)
75. Run The World (Girls) - Beyoncé (1.187.000)
76. Thinking Of You - Katy Perry (1.008.000)
77. I'm Into You - Jennifer Lopez (870.000)
78. Marry The Night - Lady Gaga (865.000)
79. Not Myself Tonight - Christina Aguilera (809.000)
80. Funhouse - P!nk (599.000)
Bubbling Under: Moment 4 Life, Miles Away, Fly, Gypsy, Your Body, Check It Ou, Talk That Talk, Love On Top.
Points earned by singer (average)
01. Lady GaGa - 5.0m
01. Katy Perry - 5.0m
03. Ke$ha - 3.4m
04. P!nk - 3.2m
05. Rihanna - 2.9m
06. Jessie J - 2.5m
07. Britney Spears - 2.2m
08. Beyoncé - 2.1m
09. Jennifer Lopez - 2.0m
10. Shakira - 1.8m
11. Madonna - 1.7m
12. Nicki Minaj - 1.4m
13. Christina Aguilera - 0,6m
Singers with most singles in the chart:
01. Lady GaGa (12/12)
(Poker Face, Bad Romance, Just Dance, Born This Way, Telephone, Alejandro, Paparazzi, The Edge Of Glory, LoveGame, Judas, Yoü And I, Marry The Night)
01. Katy Perry (12/12)
(California Gurls, I Kissed A Girl, Hot N Cold, Firework, Teenage Dream, E.T, Last Friday Night, Wide Awake, Part Of Me, The One That Got Away, Waking Up In Vegas, Thinking Of You)
03. Rihanna (12/17)
(We Found Love, Only Girl (In The World), S&M, Rude Boy, What's My Name, Diamonds, Where Have You Been, Russian Roulette, California King Bed, Cheers, Hard, You Da One / Rockstar 101, Man Down, Talk That Talk, Birthday Cake, Cockiness)
04. Ke$ha (7/7)
(Tik Tok, We R Who We R, Your Love Is My Drug, Blah Blah Blah, Die Young, Blow, Take It Off)
05. P!nk (7/8)
(So What, Raise Your Glass, Blow Me (One Last Kiss) ****in' Perfect, Sober, Please Don't Leave Me, Funhouse)
06. Britney Spears (7/9)
(So What, Raise Your Glass, Blow Me (One Last Kiss) ****in' Perfect, Sober, Please Don't Leave Me, Funhouse)
07. Beyoncé (6/9)
(If I Were A Boy, Halo, Single Ladies (Put A Ring On It), Sweet Dreams, Best Thing I Ever Hard, Run The World (Girls) / Video Phone, Love On Top, Countdown)
08. Madonna (4/8)
(4 Minutes, Give It 2 Me, Celebration, Give Me All Your Luvin' / Miles Away, Revolver, Girl Gone Wild, Turn Up The Radio)
09. Shakira (3/5)
(Waka Waka, She Wolf, Loca / Gypsy, Rabiosa)
10. Nicki Minaj (3/8)
(Starships, Super Bass, Pound The Alarm / Your Love, Check It Out, Right Tru Me, Moment 4 Life, Fly)
11. Jennifer Lopez (3/5)
(On The Floor, Dance Again, I'm Into You / Papi, Goin' In)
12. Jessie J (2/3)
(Price Tag, Domino / Laserlight)
13. Christina Aguilera (2/4)
(Keeps Gettin' Better, Not Myself Tonight / Your Body, You Lost Me)
Source: http://www.mediatraffic.de/