Select a plain dress and find sequins you can attach to it. Use different patterns to add sequins at the front of the dress and along the waistline for a night-out fancy dress. Mix up the sequins as they reflect light differently, making your dress stand out.
Transform an evening dress into a fancy dress for prom night by attaching a train at the back to emulate a princess or wings at the back to look like a fairy fancy dress. Dress up your outfit with a tiara and a pair of silver or glass sandals to complete the princess or fairy fancy dress.
Cut an old, slim black dress to thigh length and match it up with thigh-high boots. Wear a cat mask and dark lipstick and carry a whip for a cat woman costume.
Search for a dress with a defined waistline and attach feathers along the waist to make a fancy dress dance costume.