The News got a first look inside the home of MTV’s new reality show, “Pageant Place,” last week – and found that living with three princesses isn’t always pretty.

Slobby habits can cause ugly scenes, and domestic bliss relies on the roomies pulling their weight.

“I leave my stuff out,” admitted Katie Blair, 2006′s Miss Teen USA. “I don’t put out the trash. It’s disgusting and I don’t touch it.

“[Miss USA] always hated that…. You have to get used to knickknacks, people’s pet peeves. Everyone has their things they worry about and make a big deal over.”

“Pageant Place,” promises to put you upclose and personal with Miss Universe Riyo Mori, Miss USA Rachel Smith and former Miss Teen USA Katie Blair.

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The series also features Hilary Cruz, who won Blair’s tiara last month and replaced her in the luxury pad three weeks ago.

Former Miss USA Tara Conner, who last year became more famous for her wild partying and drug problems than for winning her title, also drops in as a big sister, eager to help guide the girls away from temptation.

“I put school on hold when I won Miss Teen USA,” said Blair. “This was like my sorority. These girls were like my sisters.”

But even sisters aren’t always close.

“We are girls first and foremost,” said Smith, “normal young women….

“It’s good to have people to talk to, people who understand things like having a bad hair day.

“But we spend time apart as well,” said Smith. “It’s just like any other roommate situation. Just because we are roommates doesn’t mean we have to be best friends. When it gets too much, I spend time in my room.”

The apartment, owned by Donald Trump – who runs the Miss Universe Organization – has three almost identical bedrooms, all with double beds and private bathrooms. They all have white bedspreads, dressing tables and a TV. Fresh flowers sit on bedside cabinets.

And all have personal touches added by their occupants in a bid to make them feel like home.

A photograph of Cruz’s dog Maddie hangs above her bed, a framed picture of Smith’s parents sits beside her TV and a leopard print blanket brought from Tennessee is draped across a chair.

Mori, the furthest from home, has a few Japanese books on a desk.

“Living with two girls, I like it,” she said in almost perfect English. “If I was here by myself, I would get homesick. They distract me, we have fun together.”

They also learn from each other. Mori teaches the other two Japanese words, they teach her English.

“But they teach me slang,” she says. “I don’t even know what it means. Sometimes I use it, and people laugh.”

All their closets are packed, though the clothes and shoes that have not come from sponsors or as gifts could fit in a single suitcase.

The rest of the apartment – a living room, dining room and kitchen with views up to Central Park – is bare of personal items. The refrigerator is empty.

“I moved in here three weeks ago, but we travel so much,” said Cruz. “This week is the first time I’ve spent any time here. When I am here, I sleep as much as I can.”

“Pageant Place,” which debuts Oct. 10 on MTV, will follow the beauties’ hectic schedule – both at play in the city and at work as they travel the world.

And when they are in town together, the three do socialize.

“We watch TV together,” said Mori. “We talk a lot. Oh yes, and we go shopping!”