Paris Hilton says she is disgusted with writers of "that stupid fake tweet".
Soon after news broke of the death of Nelson Mandela a tweet allegedly written by Paris emerged on Twitter account @DeletedTweets.
The post, which looked like a screenshot from Paris' Twitter profile, read: "RIP Nelson Mandela. Your 'I Have a Dream' speech was so inspiring. An amazing man."
And Paris is now refuting she ever wrote that caption, which clearly confuses Mandela with late American civil rights activist Martin Luther King.
"Whoever made that stupid fake tweet lacks respect to the loss the world is mourning right now. Same goes for all the blogs who ran with it," Paris wrote tweeted to her over 12 million followers.
Paris is in Miami attending the annual Art Basel festival and she was upset to see @DeletedTweets' post when she walked off the plane.
The star, 32, believes the hoax is simply disrespectful.
"Just landed & heard the sad new about Nelson Mandela," she wrote.
"He was a true Hero & the world is a better place because of him. May he rest in peace."
Nelson died at the age of 95 in Johannesburg surrounded by loved ones.
The South African nation's first black president is celebrated for putting an end to apartheid in the country, a system of laws that imposed severe segregation between whites and blacks.