This Christmas, Disney Parks celebrates not only the joy of the holiday season, but the unforgettable family moments it has helped guests create over the past sixty years. “Disney Parks Unforgettable Christmas Celebration,” airs Friday, December 25, 2015 (10:00 am.-12:00 p.m ET; airtimes vary; check local listings) on the ABC Television Network. Now in its 32nd year, the unforgettable Christmas special welcomes back Robin Roberts of ABC’s “Good Morning America” (GMA) as lead host. Reporting from the Walt Disney World…