To sign up, go here.
Once signed up, you'll automatically qualify for a free "deluxe" fragrance sampler and a coupon for $10 off a Pink purchase of $35 or more.
One word of caution -- I've gotten coupons for freebies from Victoria's Secret before, only to find out when I got to my local store that they were all sold out. So if you have your heart set on the fragrance sampler, you might want to call your local store to make sure it's still available. You can locate your nearest store here.