We've seen many extravagant celeb homes in the past, but this one is definitely in the top ranks. Recognized for shiny rhinestone-studded skull designs, fashion designer Philipp Plein, owns clothing brands Philipp Plein, Plein Sport, and Billionaire brand. The designer has been working on his 3.6 acres of land since he purchased it in 2014. In an Instagram post, he writes that the land in Bel Air was previously owned by the late billionaire, Howard Hughes.