"I'm not sure the deal is completely done yet, but yes, she is definitely doing it," one insider reveals. "A few more slight things to sign off on but it is happening."
A second source says the "Super Bass" rapper, 29, is "100% confirmed to judge American Idol." Reps for FOX and Minaj had no comment when contacted by Us.
Minaj -- born Onika Tanya Maraj -- toured North America with Britney Spears throughout 2011; she will embark on her own world tour beginning October 21 in Nottingham, England. The rapper's latest album, Pink Friday: Roman Reloaded, debuted at No. 1 in April 2012 and spawned two Top 10 singles, "Starships" and "Pound the Alarm."
On July 23, five-time Grammy Award winner Mariah Carey confirmed she will appear as a judge on American Idol next season. "As a singer, songwriter and producer, it's going to be fun and rewarding to help find new talent and give back with American Idol," the singer said in a statement. "I can't wait to channel my creative energy as a part of this show which is a massive global phenomenon."
As Us exclusively reported in late July, Nick Jonas, 19, is also in the running to fill one of the vacant seats at the judges' table. (Randy Jackson, 56, is being moved into a "mentoring role," according to a source.)
The "Who I Am" singer later confirmed the news via Twitter. "I am being considered to be a judge on American Idol," Jonas wrote. "And it would be a dream come true if it happens." N.E.R.D. rapper Pharrell Williams, 39, is also being considered, according to insiders.
Previous American Idol judges include Simon Cowell, 52, Paula Abdul, 50, Jennifer Lopez, 43, Steven Tyler, 64, Kara DioGuardi, 41, and Ellen DeGeneres, 54. Host Ryan Seacrest, 37, is slated to return for Season 12, premiering this winter.