There's Heidi Klum, Tim Gunn, and Nina Garcia, but who makes four? I don't know about you, but I've been jonesin' to know who the special guest on Project Runway is this week.

If you don't want to wait until tonight to find out who it is (spoiler!),

Tonight hottie Bon Jovi appears as the mystery guest on PR, moving some of the designers to tears! He will participate as a judge for the challenge, which requires the designers to create an outfit for him.

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