In a surprising moment of candor, Beyonce has opened up for the first time about her miscarriage and its aftermath in "Life Is But a Dream," her new documentary debuting on HBO on February 16th. Beyonce says; "about two years ago, I was pregnant for the first time, and I heard the heartbeat, which was the most beautiful music I ever heard in my life."

But something went wrong in the early stages she says. Watch the video to find out what she said and how the superstar dealt with the heartache the best way she knew how.

Take a sneek peak of "Life is But A Dream" below.