Most Expensive Tweets

Number of followers: 2,795,369

Value per Tweet: $10,000 and up

Famous followers: Demi Moore, Reggie Bush, Jennifer Lopez, Lamar Odom, Tyra Banks, Kimora Lee Simmons, Cash Warren, Ellen DeGeneres, Nicole “Snooki” Polizzi, Ryan Seacrest

Typical Tweet: West Coast...Keeping Up With The Kardashians is on NOW!

Since her first tweet in March 2009, the middle Kardashian daughter and E! personality has sent dozens of messages in 140 characters or less per day, responding to fans and promoting weight-loss products like Quick Trim and her Fit in Your Jeans by Friday DVDs. She may have lost some of her famous tush, but none of her shameless promotion.