The Japanese have the festivities surrounding the first pitch down.  Check out this horror movie themed first pitch.  It's the most elaborate first pitch you'll ever see.

It has the characters from those creepy ass horror movies The Ring and The Grudge in a first pitch theatrical performance.  Hell there is even a first hit.

This is how you do a first pitch.  Or you could always go with the large breasted celebrity in tight clothing.  That works too.