Aeropostale has their Bulldog sale on, with up to 70% off original prices. On top of it you can get $10 off any purchase of $50 or more with this printable coupon.
Aeropostale has a ton of stuff for teenagers and their Bulldog sale is one of their most famous, and certainly has excellent prices. This coupon is valid for this weekend only.
Coupon expires 15th, May 2011.