Preheat oven to 350.
Whisk together the flour, baking powder and salt in a medium bowl. Set aside.
Melt 2 tablespoons of butter in 10" skillet over low heat.
Remove from heat and swirl butter to coat bottom and sides of skillet.
Sprinkle the brown sugar evenly over the bottom of the skillet.
Cut 2 of the rings in half.
Place 5 whole rings and 4 half rings to cover the bottom of the skillet.
Place maraschino cherries in middle of each ring.
In a large mixing bowl, cream together remaining butter and sugar until blended.
Beat in the eggs one at a time and then the vanilla.
Gradually add in the dry ingredients and pineapple juice, while mixing continuously.
Carefully pour the batter evenly into the skillet, spreading it evenly over the fruit (careful not to move them).
Bake for 45-50 minutes until top is golden brown and a toothpick inserted in middle comes out clean.
Allow to cool for 10 minutes before placing a plate over the skillet and flipping.