After that, Beyonce — who is performing at halftime of this Sunday's Super Bowl — says she was devastated.
"I went into the studio and wrote the saddest song I've ever written in my life," she says. "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."
Thankfully, the story has a happy ending, as Beyonce gave birth to her daughter Blue Ivy a little over a year ago.
We're proud of B for being open about this difficult experience. And thank goodness she was able to have Blue, since Beyonce seems like such an amazing mom!