Jonas brothers are in concert most of the year. You have not mentioned which concert you would be going to. A tip of advise for you, it is said that they meet with those people who are very early to the concert so be early if you can. Here is a link from where you might be able to buy them online.
www.tvdance.com/information/tickets/concert/jonas-brothers/
www.tvdance.com/information/tickets/concert/jonas-brothers/
