In this week’s edition of TVWeek.com’s Executive Briefing, “American Idol” executive producer Nigel Lythgoe reveals which big music star will follow rock group Queen on next week’s show.

In addition to previewing tonight’s episode, Mr. Lythgoe reveals the real reason Katharine McPhee changed her song in Tuesday night’s competition.

Also, Mr. Lythgoe gives Simon and the other judges a taste of their own medicine, saying, “I thought the judges were a little flat last night.” To hear the interview in its entirety, click here .