Two weeks before she was to tie the knot with 98° singer Nick Lachey on Oct. 26, popster Jessica Simpson was beset by fashion nightmares. "I kept having a dream," she says, "that I'm walking down the aisle in a Juicy sweatsuit." In fact, as a radiant Simpson, 22, made her entrance before about 350 guests in a stone chapel at Riverbend Church in Austin, Texas, she was adorned in a strapless Vera Wang gown beaded with pearls from the bodice down to the tip of its majestic train. That sight alone may have been enough to move the groom to tears.