On the Market Since: 2012
Total Area: 10,000 square feet
Initial Value: $13.5 million*

Consider this a very musical mansion. Pop star Christina Aguilera bought her 10,000-square-foot mansion from rocker Ozzy Osbourne and his wife, Sharon. The initial value of the home was $13.5 million. Aguilera then decided to put it on the market, and she found that, despite the stunning Spanish-style looks of the home, it wasn’t selling so well.

The home went on the market in 2012, and it took two years to sell. Unfortunately, Aguilera took a $2 million hit on the property, as it sold only for $11.5 million. Aguilera seems to have moved on, having purchased a new $10 million Beverly Hills mansion a year later.