My Top 70 Pop Singers Of All-Time

I just spent 3 hours on this; probably more time than I should have! But I wanted to get a comlete comprehensive list.
I based it mostly on the range of voice and the ability to make said songs smooth. To a lesser degree I (generally) factored in the ability to entertain (includes attractiveness and charisma and dancing) and the ability to make a song pop or sing a ballad. These parameters (for myself) left solid singers like Frank Sinatra, Pavarotti or Liam Gallagher (Oasis) off of the list.
Let me know what I got wrong and what I got right (in your opinion). Also let me know who you think I omitted.
I also should point out that this list is not my 70 favorite singers. I tried to judge it on ability and as such I had to factor in predominant opinions (For instance I've never been a fan of Beyonce or Lady Gaga).
Hope you enjoy it! Thanks.
My Top 70 Pop Singers
1. Dave Gahan (Depeche Mode, Solo)
2. Michael Jackson (Solo, Jackson 5)
3. David Bowie (Solo)
4. Elvis Presley (Solo)
5. Simon Le Bon (Duran Duran)
6. Michael Hutchence (INXS)
7. Julie Andrews (Andrews Sisters)
8. Raven-Symoné (Cheetah Girls)
9. Danny Elfman (Oingo Boingo)
10. Justin TImberlake (N'Sync, Solo)
11. Kylie Minogue (Solo)
12. José Fernando "Fher" Olvera (Maná)
13. Paul McCartney (Beatles, WIngs, Solo)
14. Prince (The Revolution)
15. Billy Idol (Solo)
16. Neil Diamond (Solo)
17. Jim Morrison (Doors)
18. Nadine Coyle (Girls Aloud)
19. Agnetha Fältskog (ABBA)
20. Terri Nunn (Berlin)
21. Kate Pierson (B-52's)
22. George Michael (Wham!, Solo)
23. David Macklovitch (Chromeo)
24. Ezra Koenig (Vampire Weekend)
25. Ben Gibbard (The Postal Service, Death Cab For Cutie)
26. Morten Harket (A-Ha)
27. Caroline Polachek (Chairlift)
28. Vanessa White (Saturdays)
29. Beyonce Knowles (Solo, Destiny's Child)
30. Alyson Michalka (Aly & AJ, 78Violet)
31. Bono (U2)
32. Barry Gibb (Bee Gees)
33. Alizee (Solo)
34. Morrissey (Smiths, Solo)
35. Roland Orzabal (Tears For Fears)
36. Brandon Flowers (Killers)
37. Imogen Heap (Imogen Heap, Frou Frou)
38. Billy Corgan (Smashing Pumpkins, Zwan)
39. Sia Kate Isobelle Furler (Sia, Zero 7)
40. Taylor Swift (Solo)
41. Damon Albarn (Blur)
42. Art Garfunkle (Simon & Garfunkle)
43. Andy McCluskey (OMD)
44. Eleanor Kate Jackson (La Roux)
45. Vanessa Hudgens (Solo)
46. Zach Rogue (Rogue Wave)
47. Elton John (Solo)
48. Michael Stipe (REM)
49. Katy Perry (Solo)
50. Billy Joel (Solo)
51. Chuck Berry (Solo)
52. Dave Wakeland (General Public, English Beat)
53. Kor Gardner (Mates Of State)
54. Jesca Hoop (Solo)
55. Amy Lee (Evanesence)
56. Christina Aguilera (Solo)
57. Miley Cyrus (Hannah Montana, Solo)
58. Stefani Germanotta (Lady Gaga)
59. Nicole Scherzinger (Pussycat Dolls)
60. Cyndi Lauper (Solo)
61. Adam Young (Owl City)
62. Mira Aroyo (Ladytron)
63. Karin Dreijer Andersson (The Knife)
64. Yael Naïm (Solo)
65. Peter Cetera (Chicago, Solo)
66. Peter Noone (Herman's Hermits)
67. Peter Murphy (Bauhaus, Solo)
68. Bernard Sumner (New Order)
69. Marvin Gaye (Solo)
70. Liz Enthusiasm (Freezepop)
I based it mostly on the range of voice and the ability to make said songs smooth. To a lesser degree I (generally) factored in the ability to entertain (includes attractiveness and charisma and dancing) and the ability to make a song pop or sing a ballad. These parameters (for myself) left solid singers like Frank Sinatra, Pavarotti or Liam Gallagher (Oasis) off of the list.
Let me know what I got wrong and what I got right (in your opinion). Also let me know who you think I omitted.
I also should point out that this list is not my 70 favorite singers. I tried to judge it on ability and as such I had to factor in predominant opinions (For instance I've never been a fan of Beyonce or Lady Gaga).
Hope you enjoy it! Thanks.
My Top 70 Pop Singers
1. Dave Gahan (Depeche Mode, Solo)
2. Michael Jackson (Solo, Jackson 5)
3. David Bowie (Solo)
4. Elvis Presley (Solo)
5. Simon Le Bon (Duran Duran)
6. Michael Hutchence (INXS)
7. Julie Andrews (Andrews Sisters)
8. Raven-Symoné (Cheetah Girls)
9. Danny Elfman (Oingo Boingo)
10. Justin TImberlake (N'Sync, Solo)
11. Kylie Minogue (Solo)
12. José Fernando "Fher" Olvera (Maná)
13. Paul McCartney (Beatles, WIngs, Solo)
14. Prince (The Revolution)
15. Billy Idol (Solo)
16. Neil Diamond (Solo)
17. Jim Morrison (Doors)
18. Nadine Coyle (Girls Aloud)
19. Agnetha Fältskog (ABBA)
20. Terri Nunn (Berlin)
21. Kate Pierson (B-52's)
22. George Michael (Wham!, Solo)
23. David Macklovitch (Chromeo)
24. Ezra Koenig (Vampire Weekend)
25. Ben Gibbard (The Postal Service, Death Cab For Cutie)
26. Morten Harket (A-Ha)
27. Caroline Polachek (Chairlift)
28. Vanessa White (Saturdays)
29. Beyonce Knowles (Solo, Destiny's Child)
30. Alyson Michalka (Aly & AJ, 78Violet)
31. Bono (U2)
32. Barry Gibb (Bee Gees)
33. Alizee (Solo)
34. Morrissey (Smiths, Solo)
35. Roland Orzabal (Tears For Fears)
36. Brandon Flowers (Killers)
37. Imogen Heap (Imogen Heap, Frou Frou)
38. Billy Corgan (Smashing Pumpkins, Zwan)
39. Sia Kate Isobelle Furler (Sia, Zero 7)
40. Taylor Swift (Solo)
41. Damon Albarn (Blur)
42. Art Garfunkle (Simon & Garfunkle)
43. Andy McCluskey (OMD)
44. Eleanor Kate Jackson (La Roux)
45. Vanessa Hudgens (Solo)
46. Zach Rogue (Rogue Wave)
47. Elton John (Solo)
48. Michael Stipe (REM)
49. Katy Perry (Solo)
50. Billy Joel (Solo)
51. Chuck Berry (Solo)
52. Dave Wakeland (General Public, English Beat)
53. Kor Gardner (Mates Of State)
54. Jesca Hoop (Solo)
55. Amy Lee (Evanesence)
56. Christina Aguilera (Solo)
57. Miley Cyrus (Hannah Montana, Solo)
58. Stefani Germanotta (Lady Gaga)
59. Nicole Scherzinger (Pussycat Dolls)
60. Cyndi Lauper (Solo)
61. Adam Young (Owl City)
62. Mira Aroyo (Ladytron)
63. Karin Dreijer Andersson (The Knife)
64. Yael Naïm (Solo)
65. Peter Cetera (Chicago, Solo)
66. Peter Noone (Herman's Hermits)
67. Peter Murphy (Bauhaus, Solo)
68. Bernard Sumner (New Order)
69. Marvin Gaye (Solo)
70. Liz Enthusiasm (Freezepop)