"If tag exists" format

Dear WP fam,

I am hitting a stumbling block on the format of what I am trying to accomplish.

I want to output links at the bottom of my post if and only if a certain tag exists for the post.

To illustrate I’ll write out the conditional statement in regular english.

Example URL: http://www.nicekicks.com/2010/10/day-sneaker-history/

If the tag “Air Jordans” exists, then echo “Jordans.

Thanks for the help!