
Anthony Weiner —
Anthony Weiner was a hotshot U.S. congressman from New York until he acknowledged tweeting photos of his, ahem, private parts to a woman who was not his wife. He resigned in disgrace in June 2011.

Kelly Oxford —
Kelly Oxford was an unknown Canadian mom before her witty Twitter musings earned her 450,000 followers, praise from Roger Ebert and an offer to write a TV pilot. Her first book comes out next month.

Sohaib Athar —
Sohaib Athar, a computer consultant from Abbottabad, Pakistan, unknowingly live-tweeted part of the May 2011 U.S. raid that killed Osama bin Laden.

Paraskevi Papachristou —
Greek triple jumper Paraskevi Papachristou was banned from the 2012 London Olympics and suspended from her country's Olympic team for an offensive post on Twitter.

Gilbert Gottfried —
Comedian Gilbert Gottfried, perhaps best known for voicing the evil parrot Iago in Disney's "Aladdin," was fired from his job as the voice of the Aflac duck for making jokes on Twitter about the 2011 tsunami that devastated Japan.

Justin Halpern —
Justin Halpern parlayed his father's hilariously blunt-spoken take on life into a popular Twitter feed, Sh*t My Dad Says, followed by a book and sitcom of the same name.

Ashton Kutcher —
On April 16, 2009, actor Ashton Kutcher became the first Twitter user to get more than 1 million followers (narrowly beating out CNN's breaking-news account).


