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Jessica Simpson

SC/GJC/FAMEFLYNET PICTURES

Jessica Simpson's signature look was in full force over the weekend.

The pregnant Fashion Star judge wore a long-sleeved black dress to a friend's wedding in the Pacific Palisades on Saturday, the bump-hugging gown covering everything except Simpson's famous cleavage.

Even her underclothes couldn't be tamed, a hint of black lace peeking out above her dress' can't-help-but-plunge neckline.

You might think that the black dress and heavy eye makeup were a little Goth for a spring vow swap in Southern California, but Simpson's the fashion expert, people.

Also in attendance at her pal's nuptials were her fiancé, Eric Johnson, sister Ashlee Simpson and mom Tina.

Simpson and Johnson are expecting their second child together, a baby brother for their nearly year-old daughter, Maxwell.