If you've ever felt like a plastic bag, drifting through the wind, then this house is for you.

Pop singer Katy Perry has her Hollywood Hills mansion up for sale -- for $9.5 million, according to real estate website Trulia.

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The 1954 house/mansion/LA palace is really a compound with four different buildings: a Mediterranean-styled "main house," massive guest house with a garage long enough to fit a limo, fitness building, and a security house.

Plus there's a pool, outdoor grill, cabana, fireplace, and fountain and a view. It's all surrounded by 2 acres of land and tucked away in an exclusive hillside community.

The master suite -- the entire second floor of one of the buildings -- features an epic bath tub. If good ideas come in the shower, then record-breaking hits must come from this Roman bath with a sky ceiling.

The new American Idoljudge has been living the adult dream. No need to wake up in Vegas -- the mansion also has an outdoor amphitheater. All you need are the fireworks.