Does anybody know where I can buy concerttickets in Germany?
 

Please let me know. Please not online but preferably in a store since I need to have the tickets before sunday.

Almost every large shopping centre has a booth called "Theaterkasse" or "Theater-und Konzertkasse", you can buy tickets to almost every concert in Germany there. (They're connected to the Eventim network, it's like Ticketmaster in the US).

Just look at the website of the shopping mall thats closest to you

What she said. That's also where I get mine from.