Tallulah Willis’ “something borrowed” was built right into her dress. The writer and artist, 32, married musician Justin Acee in Sun Valley, Idaho, on Saturday in a custom Balenciaga couture gown by Pierpaolo Piccioli. The sculptural, curved neckline of the dress paid homage to mom Demi Moore, who wore a black sheath by the French house with a similar silhouette to the Vanity Fair Oscar party earlier this year. The first iteration of the gown had a straight neckline, but the bride pushed for something with more interest. “I just thought, wouldn’t it be so beautiful to have no necklace and nothing up here, but just the shape,” the bride…
