Natasha is the 100th biggest selling female of the 21st century for her #1 single “These Words” according to the Official UK Charts Company. The full-list as of Jan 2009 can be found below:

1. Kylie Minogue – Can’t get you out of my head (1100000)
2. Alexandra Burke – Hallelujah (1026830)
3. Atomic Kitten – Whole again (960000)
4. Leona Lewis – Bleeding love (937100)
5. Leona Lewis – A moment like this (845000)
6. All Saints – Pure shores (720000)
7. Sonique – It feels so good (650000)
8. Rihanna – Umbrella (628500)
9. Shakira – Whenever wherever (620000)
10. Girls Aloud – Sound of the underground (612000)
11. Las Ketchup – Asereje (The Ketchup Song) (590000)
12. Shakira ft Wyclef Jean – Hips don’t lie (580000)
13. Spiller ft Sophie Ellis-Bextor – Groovejet (If this ain’t love) (577000)
14. LeAnn Rimes – Can’t fight the moonlight (570000)
15. Duffy – Mercy (556500)
16. Madonna – Hung up (525000)
17. Katy Perry – I kissed a girl (509050)
18. Pussycat Dolls ft Busta Rhymes – Don’t Cha (500000)
19. Christina Aguilera, Lil’ Kim, Pink & Mya – Lady Marmalade (480000)
20. Estelle ft Kanye West – American Boy (466100)
21. Gabrielle – Rise (457000)
22. Sugababes – About you now (455000)
23. Britney Spears – Oops… I did it again (445000)
24. Destiny’s Child – Independent Women pt 1 (440000)
25. Leona Lewis – Run (435825)
26. Madonna ft Justin Timberlake – 4 minutes (432300)
27. Geri Halliwell – It’s raining men (420000)
28. Sugababes – Push the button (410000)
29. Atomic Kitten – The tide is high (410000)
30. Beyonce – If I were a boy (409520)
31. Holly Valance – Kiss kiss (406000)
32. Melanie C & Lisa ‘Left-eye’ Lopes – Never be the same again (401000)
33. Madonna – Music (401000)
34. Girls Aloud – The Promise (399030)
35. Atomic Kitten – Eternal Flame (385000)
36. Pink – So what (384750)
37. Madonna – American Pie (382000)
38. Cheeky Girls – Cheeky song (touch my bum) (377000)
39. Katy Perry – Hot n cold (373900)
40. t.A.T.u. – All the things she said (370000)
41. Rihanna – Disturbia (367840)
42. Blu Cantrell ft Sean Paul – Breathe (365000)
43. Nelly Furtado – Maneater (361000)
44. Mariah Carey & Westlife – Against all odds (360000)
45. Melanie C – I turn to you (355000)
46. Beyonce – Crazy in love (355000)
47. Sandi Thom – I wish I was a punk rocker (350000)
48. Rihanna – Don’t stop the music (344500)
49. Rihanna – Take a bow (336700)
50. Beyonce & Shakira – Beautiful Liar (335000)
51. Britney Spears – Toxic (330000)
52. Jordin Sparks ft Chris Brown – No air (329000)
53. Pink – Get this party started (325000)
54. Kate Nash – Foundations (320000)
55. Gabrielle – Out of reach (315000)
56. Madison Avenue – Don’t call me baby (315000)
57. Anastacia – Left outside alone (310000)
58. The Corrs – Breathless (310000)
59. Britney Spears – Born to make you happy (307000)
60. Cascada – Everytime we touch (305000)
61. Gwen Stefani – Sweet Escape (300000)
62. Sophie Ellis-Bextor – Murder on the dancefloor (300000)
63. Michelle McManus – All this time (295000)
64. Dido – White Flag (294000)
65. Gabriella Cilmi – Sweet about me (290400)
66. Britney Spears – Womanizer (289100)
67. Sweet female attitude – Flowers (288000)
68. Adele – Chasing pavements (288000)
69. Destiny’s Child – Lose my breath (285000)
70. Lily Allen – Smile (280000)
71. Rihanna – S.O.S. (Rescue me) (280000)
72. Christina Aguilera – Dirrty (280000)
73. Fergie – Big boys don’t cry (275000)
74. Amy Winehouse – Rehab (275000)
75. Avril Lavigne – Girlfriend (270000)
76. Kylie Minogue – Spinning around (270000)
77. Sugababes – Freak like me (265000)
78. Destiny’s Child – Survivor (265000)
79. Christina Aguilera – Beautiful (260000)
80. Rihanna – Unfaithful (255000)
81. Emma Bunton – What took you so long? (255000)
82. Geri Halliwell – Bag it up (255000)
83. Beyonce – Irreplaceable (255000)
84. Kelis – Milk Shake (250000)
85. Eve & Gwen Stefani – Let my blow ya mind (250000)
86. Samantha Mumba – Always come back to your love (250000)
87. Sugababes – Round round (250000)
88. Britney Spears – Everytime (250000)
89. Billie Piper – Day and night (245000)
90. Spice Girls – Holler / Let love lead the way (245000)
91. Lene Marlin – Sittin’ down here (245000)
92. Frankee – Fuck you right back (245000)
93. Alicia Keys – No one (245000)
94. Girls Aloud – Call the shots (245000)
95. Samantha Mumba – Gotta tell you (245000)
96. Pink – Just like a pill (240000)
97. Shakira – Underneath your clothes (240000)
98. Mary Mary – Shackles (Praise you) (240000)
99. Pussycat Dolls – Stickwitu (235000)
100. Natasha Bedingfield – These words (235000)

Source: Sandi-Thom.net