So You Think You Can Dance producer Nigel Lythgoe says that Katie Holmes will perform on Thursday's SYTYCD elimination show.

He said,

“It’s about a charity [but] I do not have the status. It’s just not legal to talk about it at the moment,” he explained.

But Lythgoe, who is rumored to be directing Holmes in choreography by Tyce Diorio, did spill another juicy tidbit.

“Katie is a small part of what is going on,” he said. “It’s more than Katie.”

Katie Holmes is rumored to be dancing in a tribute to Judy Garland's "Get Happy" from Summer Stock. Hmmm...