In case of a breakout before a special occasion, do not panic. Don’t change out of the backless dress just as yet. Use a liquid concealer to cover blemishes and marks. Conceal unsightly marks and bumps with body foundation. After you’re done concealing spots and covering up, dust some translucent powder all over your back. For a glowy effect, use a powder puff to evenly press the powder to the skin. To really rock a backless dress, affect the shimmering look by using a tinted or gold foundation.