American Kim Kardashian is reportedly paid up to $10,000 each time she posts a sponsored tweet

"Last December, social media guru Chris Brogan received a $500 gift card from K-mart to write an entire blog post about his visit to a K-mart store. Reality show vixen Kim Kardashian's rate? $10,000 per-tweet, according to Advertising Age's Michael Learmonth. Yes, you read that right. Ten. Thousand. Dollars. Per. Tweet.
Kardashian works with "in-stream advertising" company Ad.ly, which also includes Stephen Colbert, Lauren Conrad and Dr. Drew as clients. Derek Rey, co-founder of Ad.ly, told PRNewser today Kardashian "can command" $10,000 per tweet and that Ad.ly limits its "publishers" -- as it calls Kardashian -- to one paid tweet per day as to not alienate her audience. "We're not a polluter," Rey said."
Source: Michael Learmonth of AdAge, reported by the MediaBistro blog, 21st December 2009
Note - Kim Kardashian has 2.7 million followers as at 29th December 2009. She is the 10th most followed person on twitter.