Over at American Apparel, you can get 20% off your online purchase until April 30.
To redeem this discount, just enter promo code JOINUS at checkout (after you complete your shipping and billing information). The discount can't be used in conjunction with other offers. Also, it cannot be used towards the purchase of retail & online gift certificates, multipacks, watches and newsstand, multibrand, vintage, luxury or sale-priced products.
As usual, there's free standard shipping on orders that come to $75 or more before taxes.