After two days of live performances by the 20 singers who have made it thus far in this year’s competition, tonight that numbers will be cut in half, ending up with the year’s Top 10. It’s the viewers, not the judges, who are making the cuts this time, but expect, on this live outing, that the judges still will have plenty to say. Especially Nicki Minaj (pictured), who seems to have no seven-second delay in her own head, and Mariah Carey, who seems to have no sense of time bein