atings for Fox's So You Think You Can Dance continued to erode on Tuesday as it faced an hour of NBC's The Voice and America's Got Talent. Ratings for those two shows were no great shakes either. The Voice drew 10.57 million viewers, a Tuesday low for the series, while America's Got Talent averaged 11.10 million viewers between 9:00 p.m. and 11:00 p.m., the smallest number yet for a season opener of AGT. Meanwhile, it was reported that the onetime talent-contest leader, American Idol, will not only see a new panel of judges next season but also new executive producers. Trade stories said that Nigel Lythgoe and Ken Warwick have effectively been fired following plunging ratings for the show last season.