"It's very basic," Joel Smallbone, 36, tells PEOPLE, explaining how he and his brother cracked the "Little Drummer Boy" code. "This is a song about a boy who's playing a drum for Jesus. And here ...

where she discussed her experience recording the popular tune "Little Drummer Boy" with her son Isaiah, 5½, on her Christmas album My Gift, out now. "When I first heard it back I was laughing and ...