Beyonce's miscarriage was "the saddest thing" she'd ever gone through [VIDEO]

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In Beyonce's self-directed HBO documentary, "Life is but a dream," the songstress opens up about her painful miscarriage for the first time ever, Us Weekly reported.

On January 7th 2012, Beyonce, 31, became the happy mother of Blue Ivy Carter, her first baby with her husband Jay-Z, but a short time before that, the singer lost a baby in the early stages of her first pregnancy.

In a candid moment featured in her upcoming documentary, the singer discusses the aftermath of the incident. She says,

This experience was life-changing for the "Love On Top" singer, who confessed to never having felt that sad in her life.

Fortunately, Beyonce was soon given a second chance to become a mother. The singer compared being pregnant a second time with "falling in love."

"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" premieres February 16 on HBO at 9p.m.