Alex & Sierra, the Central Florida duo that won "The X Factor," will perform "Love Is an Open Door" from "Frozen" on the "Disney Parks Frozen Christmas Celebration."
The 31st annual Christmas Day telecast has a "Frozen" theme this year to salute the Disney blockbuster. YouTube favorite Lexi Walker, 12, will perform "Let It Go," the Oscar-winning song from the film.
"Disney Parks Frozen Christmas Celebration" will air 10 a.m. to noon on Dec. 25 on ABC.
"Good Morning America" anchor Robin Roberts hosts the program with an assist from Tim Tebow, a "GMA" contributor. They lead the telecast from Walt Disney World Resort in Florida. The performers in Orlando include Alex & Sierra; Ariana Grande, who sings "Santa Tell Me" and "Last Christmas"; and Prince Royce, who delivers "I Want to Wish You a Merry Christmas/Feliz Navidad."
Rob Marciano of "GMA" will host from Disneyland Resort in California. Trey Sonz, Lucy Hale and Train perform there. Trisha Yearwood will sing "Prizefighter" and "Have Yourself a Merry Little Christmas."
Sarah Hyland of "Modern Family" hosts from Aulani, a Disney Resort & Spa in Hawaii. Gavin DeGraw sings "Fire" and "I'll Be Home for Christmas." Laura Marano of Disney Channel's "Austin & Ally" sings "Do You Want to Build a Snowman?"
Miss America 2015, Kira Kazantsev, also appears in the program.
The special will reunite three groups of family and friends at Disneyland, Walt Disney World and Aulani. Those reunions reflect the spirit of "Frozen" and the story of sisters reunited by love, Disney said.