Olivia Newton-John

John Travolta and Olivia Newton-John's mystifying Christmas video

As Mariah Carey and the Roots proved on "Late Night With Jimmy Fallon" on Tuesday night, very occasionally an original Christmas song can deliver as much cheer as one of the old standbys.

But most of the time? Not so much.

Take, for example, "I Think You Might Like It," the sole original from John Travolta and Olivia Newton-John's new album, "This Christmas."

It's a lightly country-flavored ditty about returning to one's hometown for the holidays, harmless in theory but charmless in practice,...