EXCLUSIVE: Mariah Carey Talks Necessary His and Hers Yachts and Wanting to Collaborate With The Weeknd

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We've heard of his-and-hers bathrooms, but his-and-hers yachts? That's how one is living if you're Mariah Carey and fiancé James Packer. The diva gave ET an exclusive tour of the yacht she's vacationing on this summer.

"It is important to have his-and-hers everything," Carey told ET.

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While Packer has the Arctic P, the seventh largest privately owned vessel in the world, Carey has a chartered 16-crew luxury liner. They're currently both anchored together off the coast of Italy.

Carey's 192-foot capri features two bars, a Jacuzzi, a gym, a library and a private chef. The master suite, with its opulent bath, is just one of six staterooms.

The Arctic P alone costs a reported $340,000 a week plus expenses, but it's clearly worth it to see the smiles on the faces of Carey's 5-year-old twins, Monroe and Moroccan.

"They love swimming in the water," Carey shared. "They are amazing swimmers."

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While Carey is enjoying her family time on the water, the pop diva isn't totally on vacation. She's updating her Caesars Palace residency in Las Vegas, titled #1 to Infinity, and working on a new album with longtime collaborator Jermaine Dupri. What's more, there could be another collaboration coming up in the future.

Two weeks ago, the 46-year-old singer posted a video to Instagram showing her singing along with The Weeknd at a party for Leonardo DiCaprio.

"That was the best. That was so much fun. I love him," she gushed to ET.

Carey will resume her Las Vegas residency at Caesars Palace on Aug. 24. Click here for ticket information.