As Twitter makes its debut on the New York Stock Exchange, we look at its 140 most popular users and how many followers they have.
1. Katy Perry, singer, 46,561,179
2. Justin Bieber, singer, 46,526,319
3. Lady Gaga, singer, 40,383,118
4. Barack Obama, President of the United States, 39,214,102
5. Taylor Swift, singer, 36,167,890
6. YouTube, video sharing site, 35,643,583
7. Britney Spears, singer, 33,795,005
8. Rihanna, singer, 32,369,513
9. Instagram, social photo site, 28,756,616
10. Justin Timberlake, singer, 27,936,121
11. Twitter, the social media site's official account, 26,310,573
12. Jennifer Lopez, singer, 24,958,876
13. Ellen DeGeneres, talk show host, 23,324,423
14. Shakira, singer, 22,657,147
15. Cristiano Ronaldo, footballer, 22,388,208
16. Oprah Winfrey, TV presenter, 21,865,247
17. P!nk, singer, 20,595,888
18. Demetria Lovato, singer, 19,656,389
19. Kim Kardashian, reality TV star, 18,675,863
20. Adele, singer, 18,339,044
Now for the other 120
21. Alicia Keys, singer, 17,481,572
22. Harry Styles, One Direction, 17,444,992
23. Kaka, footballer, 17,200,089
24. Nicki Minaj, singer, 17,117,304
25. Bruno Mars, singer, 17,110,453
26. Selena Gomez, singer, 16,949,270
27. One Direction, boy band, 16,067,670
28. Eminem, singer, 16,045,606
29. Niall Horan, One Direction, 15,377,692
30. Ashton Kutcher, actor, 15,193,573
31. Miley Cyrus, singer, 14,988,627
32. Pitbull, singer, 14,751,960
33. Lil Wayne Weezy, singer, 14,028,868
34. Liam Payne, One Direction, 13,999,249
35. Avril Lavigne, singer, 13,802,610
36. Mariah Carey, singer, 13,722,597
37. Louis Tomlinson, One Direction, 13,770,818
38. Bill Gates, inventor, 13,686,545
39. Twitter en espanol, Twitter's Spanish account, 13,303,221
40. Chris Brown, singer, 13,160,903
41. CNN Breaking News, news site, 13,154,498
42. Drake, rapper, 13,022,993
43. Beyonce, singer, 12,869,336
44. Facebook, social network, 12,508,247
45. Paris Hilton, socialite, 12,143,891
46. Ryan Seacrest, TV presenter, 11,975,948
47. David Guetta, DJ, 11,753,145
48. Jim Carrey, actor, 11,585,500
49. Wiz Khalifa, singer, 11,015,844
50. Zayn Malik, One Direction, 10,967,944
51. Snoop Dogg, singer, 10,951,083
52. UberSocial, social site, 10,936,742
53. Ariana Grande, singer, 10,827,578
54. Ashley Tisdale, actress, 10,770,145
55. Emma Watson, actress, 10,730,063
56. Coldplay, band, 10,682,928
57. CNN, news site, 10,599,017
58. Tyra Banks, model, 10,534,196
59. Jimmy Fallon, comedian, 10,511,126
60. Christina Aguilera, singer, 10,177,752
61. will.i.am, singer, 10,028,594
62. Alejandro Sanz, singer, 10,021,272
63. FC Barcelona, football club, 10,019,077
64. Charlie Sheen, actor, 9,968,502
65. LeBron James, basketball player, 9,934,192
66. The New York Times, newspaper, 9,785,818
67. Kanye West, singer, 9,762,529
68. MTV, music channel, 9,741,616
69. Kourtney Kardashian, reality TV star, 9.456,552
70. Ricky Martin, singer, 9,417,930
71. Diddy, singer, 9,361,319
72. Agnez Mo, singer, 9,277,826
73. Conan O'Brien, TV presenter, 9,247,258
74. Real Madrid FC, football club, 9,236,237
75. TwitPic, photo sharing, 9,043,805
76. Carly Rae Jepsen, singer, 8,972,029
77. Ivete Sangalo, singer, 8,892,892
78. Neymar Junior, footballer, 8,865,730
79. Daniel Tosh, comedian, 8,831,831
80. Kevin Hart, actor, 8,800,470
81. Paulo Coelho, writer, 8,589,073
82. Kelly Clarkson, singer, 8,541,415
83. Usher, singer, 8,532,702
84. Simon Cowell, music producer, 8,489,047
85. Juanes, singer, 8,460,856
86. Khloe Kardashian, reality TV star, 8,455,363
87. Ludacris, singer, 8,43,687
88. NBA, National Basketball Association, 8,389,796
89. Ed Sheeran, singer, 8,132,288
90. Leonardo DiCaprio, actor, 8,046,480
91. Paulina Rubio, singer, 7,966,280
92. Dalai Lama, spiritual leader, 7,947,162
93. Programa Panico, Brazilian TV programme, 7,938,774
94. Ronaldinho Gaucho, footballer, 7,725,864
95. BBC Breaking News, news site, 7,694,941
96. LMFAO, band, 7,662,096
97. Shaquille O'Neal, ex-basketball player, 7,660,306
98. Claudia Leitte, singer, 7,591,538
99. Nick Jonas, singer, 7,543,107
100. Funny or Die, video site, 7,411,275
101. Google, multi-national corporation, 7,434,529
102. Lindsay Lohan, actress, 7,391,477
103. 50 Cent, singer, 7,377,611
104. Luciano Huck, TV presenter, 7,300,843
105. Ramalan Indonesia, astrology site, 7,258,854
106. Tom Hanks, actor, 7,239,228
107. ESPN, news site, 7,126,116
108. Russell Brand, comedian, 7,075,914
109. Mohamad Alarefe, Islamist theologian, 7,055,683
110. Neil Patrick Harris, actor, 7,029,987
111. Gerard Pique, footballer, 6,976,585
112. Andres Iniesta, footballer, 6,973,204
113. Sherina Munaf, actress, 6,959,297
114. Marcos Mion, TV presenter, 6,870,684
115. Amitabh Bachchan, Bollywood actor, 6,866,117
116. Jessica Simpson, singer, 6,854,487
117. Maroon 5, band, 6,795,783
118. Anahi, actress, 6,786,064
119. Sabrina Sato Rahal, TV presenter, 6,634,548
120. Jessica Alba, actress, 6,621,361
121. Trey Songz, singer, 6,560,101
122. Jessie J, singer, 6,542,080
123. Victoria Beckham, fashion designer, 6,504,664
124. Eva Longoria, actress, 6,476,578
125. Nicole Polizzi, reality TV star, 6,411,887
126. Victoria Justice, actress, 6,345,437
127. Kendall Jenner, TV star, 6,331,016
128. Stephen Fry, comedian, 6,287,796
129. Breaking News, news site, 6,239,711
130. Perez Hilton, blogger, 6,141,028
131. Enrique Iglesias, singer, 6,101,599
132. Zac Efron, actor, 6,093,329
133. Sports Center, news site, 6,087,431
134. Joe Jonas, singer, 6,048,907
135. Rafinha Bastos, TV presenter, 5,902,070
136. Vine, video app, 5,890,162
137. Samsung mobile, mobile company, 5,867,348
138. David Bisbal, singer, 5,850,293
139. OMG facts, facts website, 5,822,921
140. Ne-Yo, singer, 5,807,825