formal royal blue dresses Lace-Up Long Prom Dress with Embroidery Royal Blue / Large Sweetheart Neckline Sleeves Royal Blue Sexy Thigh-high Slit

Bill Clinton became president of the United States in 1993 and in 1998 he was impeached

Carefully crafted in a bodycon silhouette of light-catching sequins, this LBD is detailed by its demure high neckline, long sleeves and dramatic feather-trimmed cuffs

Pastels are a more traditional choice, perhaps, but when rendered in sculptural fabrics and minimalist silhouettes by the likes of Dries Van Noten, Jil Sander and Cecilie Bahnsen, they become an altogether more stylish prospect

- Full sleeves

But black is a neutral colour that can be paired with an array of other colours

You could also up the glam by making it a Breakfast at Tiffany's theme complete with pearls, gloves and sunglasses