Christina Aguilera, Michael Buble, Dave Matthews and Train are among the acts helping Special Olympics celebrate the 25th anniversary of its "A Very Special Christmas" album series.

Two albums will be released Oct. 16 to celebrate the partnership, which has raised more than $100 million for Special Olympics. "A Very Special Christmas 25th Anniversary" will be released on Big Machine Records and Word Records will issue "A Very Special Christmas: Bringing Peace on Earth."

Members of Train and Francesca Battestelli will attend a news conference Monday at Blackbird Studios in Nashville, Tenn., to announce the albums.

Other artists involved in the project include Jason Mraz, Vince Gill and Amy Grant, Rascal Flatts, The Band Perry and Cheap Trick.