Celebrity sisters, Kourtney Kardashian and Kim Kardashian were spotted shopping in Miami at the Maserati car dealers recently. Kourtney had her 3 month old baby Mason along with her. The baby boy looked adorable and both the Kardashians was seen doting on the baby. Kim later bought a new convertible and left the showroom. Kourtney revealed on her blog that she and her baby went with Kim to buy a new vehicle for her sister and the Marseti Gran Tursimo bought by her is excellent in terms of grandeur. The celebrities are busy filming for their new TV reality show.