Why Heidi Klum Thinks Nicole Richie Is 'F--king Nuts'

Heidi Klum thinks Nicole Richie is "f--king nuts."

On their way back to Los Angeles from a New York City shoot for Klum's new Amazon Prime show, "Making the Cut," the 46-year-old supermodel documented Lionel Richie's 37-year-old daughter's vigorous cleaning routine of her first-class area, prior to takeoff.

"Okay so I thought that only Naomi Campbell was the nutjob, but nein! Mrs. Richie is just as f--king nuts!" Heidi said, hysterically laughing. "What is wrong with you girls?!"

The video showed Nicole aggressively putting on latex gloves as if she were gearing up for surgery. "Ready to go to work," she said sternly, sunglasses on.

"Oh, my God!" Heidi chuckled in disbelief, as Nicole began to meticulously wipe down her tray table.

"Can I just -- I just wanna make a point, though," she began to say, going through wet wipe after wet wipe. "Think about how many people..." But a flight attendant interrupted to ask the ladies if they "cared for something to drink."

"Yes! We would love a Bloody Mary, but no one will give us one," Klum blurted out.

"No one will?" the flight attendant responded. "What about me?"

The joy in Heidi's voice was palpable. "Will you really?!" she shouted, as Richie was still disinfecting away. She stopped only to let the woman know she "would love a glass of red wine."

"I mean, we just wrapped, so I think we deserve it," Klum said. "We never went to bed. We are very busy working moms here."

"And cleaning at the same time!" she added, laughing at Nicole. "You are too much."

Richie then showed off the coolest mom trick we ever did see: She put all of her used wipes into one of the gloves she was wearing and tied it shut. "It's your own little trash bag!" she proclaimed proudly.

Campbell, 49, who also stars in Klum's new show, went viral back in July when she documented her own airplane cleaning ritual.

As she showed viewers in her YouTube video, the supermodel carries disposable gloves and sanitizing wipes whenever she travels so that she can scrub down the television, arm rests, tray table, seatbelt and anything else she might touch during the flight.

"Clean anything you touch. Anything you could possibly touch," she urged in the clip. "This is what I do on every plane I get on. I do not care what people think of me. It's my health, and it makes me feel better."

Naomi also lays her own personal seat cover on the chair -- "They're hand-washed at every hotel I go to" -- before placing a mask over her mouth -- "I will eventually end up sitting like this the whole entire flight. As the plane descends, people start coughing and sneezing, and the coughing and sneezing makes me -- I just can't. This is my protection from people's coughing and sneezing. I really think this helps me, my little routine."

So what other celebs are in this must-vigorously-disinfect-airplanes club? "Real Housewives of Beverly Hills" star Lisa Rinna.

"Hotel rooms are gross," the reality star wrote in a 2016 Bravo blog. "I'm sorry, but if you think of the who, what and where that TV changer has been, you would wipe that whole f--king place down just like I do with my alcohol wipes..."

"By the way, I also wipe my plane seat down and everything around me," Rinna added. "You betcha OCD, baby, but if that keeps the bodily fluids/germs off of me, then it's so well worth it folks!"

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