David Foster Celine Dion's Voice is Magical BECAUSE ...

11/28/2015 7:21 AM PST

Celine Dion's voice is top of the game for a reason ... and it's all about silence.

Legendary music producer/songwriter David Foster gave us the lowdown on what Celine does to protect her voice before recording ... and it goes WAY beyond Mariah Carey's humidifier.