When Heidi bends down, she looks like she is speaking and reaching out to her daughters rather than Carly. She’s probably pulling her daughters back and telling them to be careful not to fall off the stage.
I’m actually surprised this doesn’t happen more often. Especially after a big win, with music soaring, and the colored confetti raining down from every direction like a blizzard. That plus camera flashes popping off every other minute. Some cell phones have a bright flash. I’d be as dizzy as a donut.