Preheat your oven to 325 degrees.
Using a hand or stand mixer, mix the butter and sugar on low speed until light and fluffy (approximately 5 minutes).
Add the vanilla and mix.
Add the eggs to the bowl one at a time, mixing well after each addition before adding the next egg.
Add the salt and baking powder to the flour and mix.
Mix in the flour mixture 1 c at a time alternating with the buttermilk beginning and ending with the flour mixture.
Spray a 12-cup bundt pan with baking spray.
In a bowl mix together the brown sugar, pineapple juice and melted butter.
Pour into the bottom of your prepared pan.
Lay your pineapple rings around the bottom of the pan and place a cherry in the center of each pineapple ring.
Pour the batter into the pan and spread it evenly.
Place the cake in the oven and bake for about an hour and 15 minutes.
The cake is done once an inserted toothpick comes out clean.
Remove the cake from the oven and allow it to cool for about 20 minutes before removing it from the pan.
Allow the cake to continue to cool on a wire rack before serving.
Serve and enjoy!