Nicki Minaj has admitted that she still doesn't quite believe she signed up to judge on American Idol.

The flamboyant singer was one of three stars added to the show, joining fellow newbies Mariah Carey and country star Keith Urban on the panel.

However, she has revealed to Hollywood Reporter that she worried about becoming "too famous" as a result of being plastered on TV every week. The 'Pink Friday' star said:

"Sometimes you are afraid of being too famous because it's almost, like, is that even cool? Being that accessible, someone you see on TV every week? I never pictured myself as that type of person. I'm still surprised that I decided to do it."

Minaj's stint on the show didn't get off to the best starts after a video emerged online of the star arguing with colleague Mariah Carey on set.