How can I get an Audi R8 in Midnight Club Complete Edition?

I have a Lamborghini but Im looking forward to get the Audi so can any one tell me how to get a n Audi R8 and how much does it costHow can I get an Audi R8 in Midnight Club Complete Edition?you have to register at rockstar social club and click the drivers test there will be a list of cheallenges you have to complete once you register and it costs like 160k i think but it is going to take you a while to get it believe me i did it