Celebrity Houses: The 15 Stars Homes Will Turn You Green With Envy

From Rihanna's Barbie dream house to Obama's lavish brick mansion, from Bieber's futuristic glass house to Clooney's 17th-century mansion, join us to enter the world of the rich and famous, and take a look at some of the most luxurious houses EVER. Get ready to go GREEN with envy...

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