Jessica Simpson has one of the biggest baby bumps in Hollywood -- leading some to believe she's got an extra bun in the oven.
When Jay Leno, 61, joked that Simpson looked like she might give birth any minute, she replied: "Not quite yet. We have some time."
Simpson, who is expecting a baby girl with fiance Eric Johnson this spring, admitted she's nervous about giving birth. "Labor is really going to hurt," she told Leno. "I have so much respect for my mom and all the women across the world."
The pregnant star also explained why she and Johnson, 32, have yet to tie the knot. "I want him to be my husband so bad," she laughed. "I do still want to wear the pretty gown, so I have to wait."
Simpson then pointed to her belly an added: "Now she'll just be in the wedding."