Is it normal?

Ever since i was about 16, I loved wearing crop tops that show my belly piercing and loved showing my stomach off. I’m still thin, 5’7 135 pounds, but i’m almost 21, and whenever i put on a shirt that shows even a little bit of stomach i’m like no i don’t like it anymore. Is this normal? Because I see like 27 years olds still wearing crop tops and belly shirts. Do people grow out of it quicker than others?