Nigel Lythgoe -- The 'American Idol' Hint

7/30/2010 4:00 PM PDT BY TMZ STAFF
Maybe the biggest move "American Idol" made this week is bringing back Nigel Lythgoe as executive producer -- which now explains why Nigel made this slip of the tongue on live TV.

Wednesday night on "So You Think You Can Dance" Nigel seemed to forget which set he was working on at that moment.

Easy mistake to make when you're about to shake up the biggest show on TV.