Check out our latest campaign that's just for fans! #constantcontact http://conta.cc/HMfwDz
Very simple, but looks like the call to action and promo is there to make it work for you.
Is the offer something compelling that you would want to actually mention on the page specifically? Are the fans going to get ongoing Fan Only coupons?
Overall, go with it. See how the response is and tweak as necessary next month.