Just wondering if I have to buy a special adapter to plug my charger in on the Jade. I know when I spend a couple days in Paris I need a special adapter. Any help or advice would be appreciated .If I do need one does anyone know where I can buy them.
Most phone chargers can automatically accept either the European 220 volts or the US 110 volts - so it is just a matter of getting a plug that fits into the wall socket.
Norwegian Jade will have average US wall sockets in the staterooms - so no, you should not need an adaptor at all. But it doesn't hurt to own an adaptor that changes the two flat prongs of US plugs to the two wider round prongs of European AC plugs.
So, the answer is "no" you should not have any problems.