In this case, most female stars choose to cover their stomachs for the sake of image and not to get themselves into trouble. After all, you can protect your image in front of the camera with or without meat. In the past, some female stars didn't pay attention to these things when they walked down the red carpet. As a result, after walking down the red carpet, there was news that a star was pregnant on the Internet. Obviously, these marketing articles are based on photos, but the stomachs of female stars in these photos really look quite big. In fact, even if you are not pregnant, sometimes there will be visual differences.
In this case, female stars can't explain clearly. Sometimes, the more they explain, the louder the voice on the Internet. Female stars who can't help but walk on carpets or other public occasions will try to cover their stomachs and prevent bad media or marketing numbers from deliberately spoofing themselves. Nowadays, many female stars will choose fitness and think that their abdominal muscles are developed. Even if you don't hide when you walk down the red carpet, you won't be photographed as big as a laundry list.
Female stars walk the red carpet, not so much to protect their self-image, as to be afraid of some bad media. Female stars are human beings, even if they have a small stomach. Being a female star is also a profession. What does it matter if she is good at acting, singing and dancing? In the final analysis, it is still a matter of mentality.