Jessica captioned her post, "On our suit and tie s-t." The couple shared a photo from their date night on their Instagrams. Jessica, 41, wore a white draped gown with a thigh-high slit and black studded stiletto sandals while Justin, 42, sported a black tux and later appeared in a white one while performing onstage during the event. The couple stepped out for a star-studded date night as they celebrated the grand opening of the $3.7 billion Fontainebleau Las Vegas resort and casino Dec. Justin Timberlake and Jessica Biel helped bring SexyBack to Sin City.