Miley's only 18, and she's already purchased her third home. Her first was a $3.4 million house around the corner from her parents' in Toluca Lake, Calif. that she bought at 17. She also turned around a Florida condo for a 6 percent profit. Her latest buy is a 5,173-square-foot compound in Studio City, Calif., boasting five bedrooms and six-and-a-half bathrooms on 1.15 acres (pictured), Zillow reports. The house also has a saltwater pool, home gym and lots of security. Think this one's a keeper?