Couric urged Knowles to enjoy the peace and quiet before the sleepless nights ahead.
"I know, everyone keeps telling me that -- 'Right now you don't have baby bags, you just, the baby's with you everywhere, so you have to enjoy this as much as you can.' ... And I am, I'm trying, but I'm still anxious. I just want to hold the baby!" Knowles said.
When Couric asked Knowles if she should get her a pink baby present or a blue one, Knowles demurred, her finger on her mouth. Couric reminded Knowles her lifelong friend and Destiny's Child band mate Kelly Rowland reportedly referred to the baby as "she."
Knowles said she had no preference. "I don't care. I just want -- I'm just like everyone else. And now I know why people say that, it's true. I just want [a healthy baby]," she said.
Watch the full story Friday on "20/20" at 10 p.m. ET.