20 Year Old Whiskey And Scotch, Is It Still Good?

i have 4 bourbons, three are beam whisky or something, and one is spey scotch. Also have about 3/4 of a 26er of crown royal. All are pretty old about 20 years of sitting around.
the bourbons are unopened, and the crown must have been opened years ago maybe? over the past 20 years they have sat in my familys cellar, which is freezing in general cuz its almost two floors under ground and i live in canada, plus no windows or light and it was rarely ever gone into.
I'm wondering if it is still okay to drink all of them without getting sick from the age its sat around for. the crown royal was closed pretty tight and they are all clear and same normal colour.
Also i know it doesnt age after its bottled, but is there any possibility its going to be stronger than a newer 2009 bottle?
help cuz its the only booze i have for a party coming up.

thanks.

[Jojo]

Over many years, you will see evaporation - and really old bottles that have been opened generally have a weaker taste. Overall, they should be fine, but there is a possibility of an altered taste if air has seeped in. When you open the bottles, smell it, taste it and go from there. I hardly think anyone will get sick from your bottles, well, that is as long as it is consumed in moderation. Drink responsibly!

[wwtp73]

I purchased a bottle of Crown on my sons 1st birthday, since then it has been in a brown paper bag in a cabinet above my refridgerator. Bottle has never been opened. His 21st b day is coming up, i am curious if the crown will be any bettersince it s 20 yrs old? Thanks for any info