Lacey Chabert and Dustin Milligan chat with ET's Rachel Smith about their new holiday film, 'Hot Frosty,' streaming now on Netflix. The actress reacts to some fans dubbing her the new 'Queen of Christmas,’ a title held for decades by Mariah Carey. Lacey shares how much she loves making holiday movies and how she decorates for Christmas early in her home with her daughter. She also talks about the unexpected 'Mean Girls' reunion she's having as Lindsay Lohan promotes her own Netflix holiday film, 'Our Little Secret,' and how she'd love to do one together next year. Meanwhile, Dustin, a.k.a. 'Hot Frosty' himself, Jack, shares how he got into shape for the role and why it was 'liberating' for him to run around shirtless in his underwear during filming.