'So You Think You Can Dance': Mary J. Blige to perform on finale

maryjblige.jpg" So You Think You Can Dance" is less than a week away from its Season 6 finale, but the festivities are just now coming together.

"We've got Adam Lambert, of course, and Mary J. Blige to perform for the finale," executive producer Nigel Lythgoe said backstage after Wednesday's (Dec. 9) results hour. "And there are a number of other celebrities that we're talking to who want to come on as well."

Lambert's appearance was announced earlier this week, but Blige signing on seems to be a new development ... apparently the first of many.

"There are a lot of [well-known artists] who are fans of the show," explains Lythgoe, "so we are very lucky to be able to bring them on."

Any guesses as to who else we'll see?

"So You Think You Can Dance's" two-hour season ender, which will feature several numbers from the Top 6 finalists, plus performances by the Top 14 eliminees and, apparently, many high profile artists airs Wednesday, Dec.16 on FOX.

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Photo credit: FOX