Lacey Chabert is Hallmark's queen of Christmas, but she's also ready to put a spell on party guests by hosting the ultimate Halloween bash. "We're all about pumpkins," Chabert exclusively told Us Weekly of her go-to fall party theme during a set visit to her Hallmark Channel series, Celebrations With Lacey Chabert, earlier this year. Chabert told Us all about her best tips for throwing a fall-inspired party - and decorating one's home for the season - starting with "really going all in on your theme.