Is it too fancy to wear a highwaisted skirt to the mall?

High waist skirts are very fashionable, so I wouldn't worry about it. However, if you feel overdressed, there are several ways that you can dress down a highwaisted skirt. Rather than wearing something like flats, which tend to appear more formal (especially when paired with a skirt), sandals or flip flops would be more casual and still chic. Also, your choices of fabric and accessories will help determine the level of formality your outfit presents.