There's fake snow on the Glee set as the cast shoots its December 7 Christmas episode. At TV Guide Magazine's Hot List party, Lea Michele (Rachel) told me the cheery holiday hour centers on Brittany (Heather Morris) — who still believes in Santy Claus. Aww, how totally Brittany. When the glee club finds out, they take elaborate steps to ensure that she (everybody join in...) "Won't Stop Believin'." Sources tell me one friend will even dress up as Old Saint Nick to keep the dream alive (Coach Beiste, perhaps?). But lurking behind the chimney to destroy Brittany's childlike wonderment is that Grinch Sue Sylvester. The Christmas carol-filled hour will also feature Mercedes getting a green slushie thrown in her face and the blossoming of Brit's romance with Artie. The cast tells me this episode is sure to bring a tear to even the Scroogiest of viewers.