I recamend ebay.com
Yes, you can buy things online from the Jonas Brothers Official fansite and Nick's website for his "Change for the Children" foundation for his diabetes.
No they do not have a STORE, but they do have an website where you can buy some pretty cool stuff.
Probably at any gift shop, department store, and at their website.
I've seen some places online that have that
Jonas brothers merch .com
you can buy it at Jonas brothers merch.com
To make your own stickers, you can buy the special sticker paper that lets you print stuff on to make stickers. I think its made by Kodak.. I think they have it at Walmart by the camera isle, or Target. You can Google "Jonas brother stickers", or you can go to eBay.com and bid on Jonas bumper stickers, and more. I <3 the Jonas brothers!
They buy their clothes from a lot of places, the more recent ones I've heard are Barney's, Topshop (UK), and a lot of others I can't remember...
bizrate.com or eBay
porkay?
No, you have to win them!
On many of the Jonas Brothers' live webchats, they talk about the places they like to eat and sometimes even have food with them. One example is that when Nick was in London, he did a webchat and he was talking about Pizza Express. If you want to go to the places they get food, the webchats would probably give yu alot of answers