Mama needs shoes! Might as well get them for less. From now through May 21st Shoe Carnival website is offering mystery coupon savings for use in-store. These coupon savings can be for an extra $5, $10, or even $15 off your purchase of $39.98 or more. This coupon can be combined with in-store promotions and sales such as buy one get one half off but not with super value items.