Cranberry Juice Stain on Clothing

I always heard that watermelon and cranberries are both used for dye and therefor either won't come out?

You should have poured straight vodka on the undies to help remove the stain. Alcohol in one of the purer forms is used for stain removal.

If Shout doesn't work you might be stuck with the pink stain. Cranberries are used as a dye, so you might not be able to get out the splash of your cape codder!
How about soaking the undewear in cranberry juice to make it all pink?

If you didn't dry them in the dryer, try something like Shout pre-laundry stain remover. It works on most of the stains that I have had, however I have never had cranberry juice spilled on underwear. lol