Mrs. Professor Bubblegum declares this the best Echo Valley Christmas Special ever! Barbie and Ken celebrate a Barbie Christmas! Santa Claus Conquers the Martians!, A big gift box full of bubblegum music from David Cassidy, The Archies, 1910 Fruitgum Company, Neil Diamond, Bobby Sherman, Sally Field, Ricky Segall, Banaroo, Chris and Peter Allen, Johnnie and the High Keys, The Rocky Fellers, The Rockfield Chorale, Roy Winters, Ronny and the Daytonas, Linn Sheldon and Showaddywaddy!