She’s a talented singer, actress and one half of the power couple dubbed “American Royalty,” but even Beyonce isn’t immune to tragedy.

For the first time, the 31-year-old has opened up about the tragic miscarriage she suffered before becoming pregnant with her daughter Blue Ivy.

In her new HBO documentary “Life Is But a Dream,” Bey speaks about the devastation of losing the baby:

“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.”

She explains that she and husband Jay-Z were ecstatic and had already picked out names for the baby. But in the midst of their excitement, something went wrong and the couple learned during a check-up that there was no heartbeat.

How did she cope? The singer dealt with the news in the best way she knew how – she channeled her emotions into her music.

“I went into the studio and wrote the saddest song I’ve ever written in my life. And it was actually the first song I wrote for my album. And it was the best form of therapy for me, because it was the saddest thing I’ve ever been through.”

Beyonce also revealed that the experience made her pregnancy with Blue Ivy all the more joyful.

“Being pregnant was very much like falling in love,” she says.

(First photos of mother and daughter)

“You are so open. You are so overjoyed. There’s no words that can express having a baby growing inside of you, so of course you want to scream it out and tell everyone.”

“Life Is But a Dream” will air February 16 on HBO. Watch the official trailer below: