Hawaiian Pulled Pork Sandwhiches

This is an easy crockpot recipe for some yummy Hawaiian pulled pork...just put these ingredients in the crockpot on low for  8 hours.  Come home and put it on a bun and dig in!  I made it with a yummy salad.

4 chicken breasts
1 20 0z. can crushed pineapple
1 T. liquid smoke
1/2 bottle barbeque sauce--I used Roys