10 year old daughter asked for clothes that are more “trendy”. Where do I get those?

I know nothing about clothes in general, much less what might be trendy for a 10 year old girl. So far, I’ve gotten her clothes from Target, Costco, etc. I don’t think she has an exact sense of what she’s looking for either. Our area is upper income suburbs. (In case “trendy” here is different than what would be “trendy” in rural or urban areas.)

Any input is appreciated!