Long before Mariah Carey and Nicki Minaj were named to the American Idol judges panel...long before they were rumored to be on the outs, the two divas joined forces on Mariah's song 'Up Out My Face'.  In fact, Mimi was one of the first in the music business to collaborate with Minaj, who in this clip from 2009 was just on the verge of her own super stardom. I don't know what kind of rivalry will take place once Idol officially begins, but I think they made a pretty good pair on this track.