With Grazia magazine apparently. *Looks at Ruth* I was in kids gap today buying something for India and there are big posters up everywhere. I think it runs until the 24th....
I think it was in big letters on the front of the mag - i think they do it that way so you can buy the mag and get the discount the week after. If so it's changed - I've been in Gap last year when it was on and went next door to ge thte magazone so I could get the discount