Nicki Minaj has slammed rumours that she has gone under the knife to enhance her looks.

The 30-year-old American Idol insisted that she has never has cosmetic surgery on her face and her changing appearance was simply down to good makeup tricks.

"When people see my makeup they think all types of crazy things that I'm doing to my skin, but its makeup," she told Extra TV.

"They'll see contour and they'll think you had surgery on your nose. No no no, look at RuPaul's drag face and you'll see how you can make your nose look any shape you want."

"I've never had surgery on my face. It's make up, people."

The Super Base singer was promoting her new lavender lipstick from her MAC Viva Glam collection.