Greenville’s Hyatt Regency hotel is filled with Christmas trees every December.But this year, one Christmas ornament is a bit different. The engagement ring was placed with loving care by the parents of a very unsuspecting Clemson senior."We wanted to do something fun and Christmas-related, so he was like, why don't we do that, since you did it as a kid,” said Casey Rossi. "I had no clue!"The question Chandler Ollila asked Casey took just a minute.But her answer lasts a lifetime. "It was definitely the craziest moment of my life..." he told WYFF News 4, after going down on one knee to ask Casey to marry him. It all happened at the Bon Secours annual Festival of Trees – a family tradition for the RossisNow, two families will celebrate this Christmas by planning a wedding. "We are over the moon,” said Michele Rossi, Casey’s mother. “Over. The. Moon!"