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| 21 |  | Aubrey O'Day
Watch me on Celebrity Apprentice 9pm Sunday, NBC. Also from Making The Band, Danity Kane, Broadway, Playboy, Peepshow, & All About Aubrey on Oxygen!
Actor, Musician, Model | 440,303 |  |
| 22 |  | Aly & AJ Michalk
All hooked up with Twitter so we're ready to go! The only official Twitter account.. We don't have individual ones..
Musician | 438,937 | |
| 23 |  | ASHANTI
CEO of Written Entertainment *OFFICIALLY TWEETING SINCE* JAN 1 2010!!!
Musician | 430,694 | |
| 24 |  | Alyson Hannigan
This is Alyson tweeting, not Alexis.
Actor | 384,286 | |
| 25 |  | Adrienne Bailon
For bookings and inquiries please contact bookings@adrienne-bailon.com
Actor, Musician | 380,607 | |
| 26 |  | Andrew Zimmern
Chef, Writer, Traveler, Host of Bizarre Foods & MSN's Appetite for Life.
Catch New Episodes of Bizarre Foods America Mon. Nights @ 9pm E/P on Travel C
Personality | 376,087 | |
| 27 |  | Alessandra Ambrosio
Victoria's Secret Angel
Model | 372,013 | |
| 28 |  | Asher Roth
grinds Toni Braxton in Vegas
Musician | 361,224 | |
| 29 |  | Anthony Edwards
Official Anthony Edwards Twitter Page - Join me with Shoe4Africa.org
Actor | 330,136 | |
| 30 |  | Axl Rose
GN'R
Musician | 326,299 | |
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