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Heidi Montag was spotted at Ketchup in West Hollywood Wednesday, and she looks super freaked out!

Wonder what the star was hiding? She was at the Sunset Strip hot spot to film her VH1 reality show Famous Food ... maybe there was a fly in her burger?!

Or, perhaps she's scared of her co-stars. Montag is co-starring on the show with The Real Housewives of New Jersey's Danielle Staub, who got in multiple fights with cast members during her time on that show. Also, Vincent Pastore, former star of The Sopranos, reportedly flipped out on a crew member at the end of filming last night!

Run for your life, Heidi!

See why Heidi's sister was recently in the news -- it's more drama -- after the jump!