It's just so fun. Hugh is the sweetest person, and he's the most down-to-earth person. We actually have a lot in common. We were both psychology majors in school and we laugh a lot together. We watch movies together. We love relaxing and having a good time and hanging out with the girls. We just keep it fun,' she said.

Added Karissa: 'We're the wild ones and party animals, and Crystal's really calm and mellow.'

However, Karissa admitted to some downsides too while living in a plush residence.

'We don't like the peacocks here. They poop everywhere, and they're loud,' she said.

The trio began dating Hefner earlier this year, following his split from his last girlfriends Holly Madison, Kendra Wilkinson and Bridget Marquardt.