iTMS and GAP partnership

I'm a regular reader of MacBidouille and I am currently in Boston... So what?
I found here a very original marketing idea from Apple: try a pair of jeans at GAP and get a code number for a free song on the iTMS.
I was too curious, I can't resist... Let's go!

After the try, a nice salesperson gave me the precious piece of paper with the code number and here it is:

I found the idea very cool... and I almost bought the jeans ;-)