It was rumored recently that Miley Cyrus’s first car was going to be a Mercedes convertible. But it turns out the moneymaking songstress who recently celebrated her 16th birthday, will be driving mom’s old car, just like many other teens. Of course in this case mom’s cast-off is a Porsche Cayenne. So far Miley only has her learner’s permit. Miley celebrated her 16th birthday at the American Music Awards and instead of getting a new car for her birthday, her father Billy Ray Cyrus built her a recording studio at the house.