Michelle Pfeiffer thrilled her followers on Instagram at the weekend, when she shared a special Christmas throwback photo.The actress posted a shot from her role in Grease 2 back in 1982 which showed her character in the movie, Stephanie Zinone, dressed as a Christmas tree.SEE: Michelle Pfeiffer shares exciting news with rare photo of sisterShe wore a sleeveless blue dress which featured red and white baubles, green tinsel and white letters spelling out 'DECEMBER' hanging from the hem.Stephanie