old navy navy blue dress Women's The Occasion Fit & Flare Taffeta Mini - 59 and wear sizes s (4) Old Navy Kids' School Uniform

Up until that point, Dianas style had been all pale pink and baby blue netting and sequins, she told British Vogue last year, and said that the black, strapless gown was Diana's first grown-up dress

Wear it knotted at the waist rather than tucked in just tie the bottom two sections into a loose knot to create a relaxed cropped effect that defines the waist while keeping the proportions easy

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No-go: Tuxedos (too formal), overly casual suits (e.g., linen)

She will sit, run, play, hug relatives, eat, and very likely dance