If you spend any amount of time on Facebook, you most likely have dozens, if not hundreds, of photos on your page.

But few of those pictures, if any, ever get printed.

Walgreens is hoping to change that with a new Facebook photo app it launched today that not only prints your Facebook photos buy also gives you the option of printing a photo caption along with your Facebook friends' comments.

Through Sept. 1, Walgreens is hoping to hook you on the concept with a generous freebie -- up to five prints free.  After that, the 5x7 photos will cost you $2.99 each.