Nicki Minaj joined American Idol because it is a "credible brand."

The "Starships" singer - who was recently confirmed as a judge on the talent show, sitting alongside Mariah Carey, Randy Jackson and Keith Urban on the panel - claims she had offers from other singing and reality shows but went for 'Idol' as it has so much history.

"This is such a credible brand. It's really serious, it's real deal it's not anything else other than really looking for talent. If I can be a part of that I'm really down for it," she said.

Nicki says she has always been a fan of the show - which is now entering its 12th season - and remembers when Jordin Sparks won the sixth series. "I remember watching American Idol in the first season and feeling inspired. I spoke to Jordin Sparks the other day and here she is starring in a movie [Sparkle] and I said to her, 'I remember watching you and picking up my phone,'" she said, speaking at the American Idol press conference.

"I didn't vote for her because my brother liked the other guy, but I told her that, 'You know you're a part of history, kind of. Because I remember calling and seeing your face and being inspired and hearing your story,'" she said.