Rowland told Washington radio station 93.9 WKYS that she let the ladies hear her emotional track, "Dirty Laundry," before she put it on her new album.
Upon first hearing Rowland's soulful song, Beyoncé's immediate reaction "was just like 'I never left'," she said.
"Which was so sweet. It was endearing. She heard how real I was and she was just like, 'I'm so proud of you.'"
Sisters stick together!