If you had polka dots filed under the "prints that feel too childish" folder, it's time to reconsider the print. Here are three aspects of Kerry's Preen dress that make it sophisticated and age-appropriate (keep these in mind when shopping for the pattern): an artsy take on the print (notice how the spots aren't uniform), color-blocking (it keeps it in fashiony, not kiddie, territory) and accessories that are more bold than sweet (we'd say her Thalé Blanc clutch and Christian Louboutins fit the bill).