A source told The Sun newspaper: ''Nicki went mad about the grass around her area, saying it was far too long for her to walk on.
''She threw a complete strop, pouting and pointing and asking someone to get a lawnmower to sort it out.''
She told the Sunday Herald Sun: "I hope whoever made that lie up chokes to death. It's the most absurd thing I've heard printed about me in a very long time.
"Who gives two f---s about someone's grass? I was wearing my wellies and it was all mud.
She added: "I would never tell anyone to cut grass. I don't give two s---s about anyone's grass.
"I went to the festival happy to have an outdoors-y type experience. Why would I go somewhere and ask somebody to cut grass?
"It's sad because I can't defend myself against these lies.''