Celebrities are regularly selling and buying expensive homes across the country, leaving their personal style on mansions, penthouses and chalets. The result is extremely expensive homes with some wild and totally bizarre features. Some A-listers had fancy interiors added, such as flat sinks or car lifts, while others have built luxury wine rooms, bowling alleys, and even mini dog mansions. Take a look at some of the wildest features celebrities have built in their homes. There are only 6 billionaires in Hollywood – can you guess who? Michael Jordan's 56,000-square-foot mansion has an infinity pool with a grass island in the middle of it and a lavish cigar room Michael Jordan's house in Chicago has been on the market for eight years, giving buyers a glimpse into his sprawling estate. The backyard is filled with amenities, including a tennis court and a pond. But most notably, the basketball star has a giant infinity pool with a grass island at the centre. A small, modern-looking bridge extends from the edge of the pool to the island. The house also has an ornate cigar room, which contains an elaborate ceiling design and handrails. The room also has card tables, which is where Jordan most likely exercises his love of gambling. Are Barack and Michelle Obama really worth US$135 million? Drake has a nearly US$400,000 mattress that is made of stingray skin and horsehair Drake's interior designer, Ferris Rafauli, partnered with Swedish company Hastens to create a mattress made of compressed leather, polished wood, suede and brass adornments. The mattress – known as the Grand Vividus – also includes horsehair, stingray skin, polyester and handwoven textiles. The Grand Vividus takes 600 hours to create and costs US$390,000. The real life of Akash Ambani, eldest son of Asia’s richest man Kylie Jenner has a mini mansion in her backyard that acts as a playhouse for her daughter For Christmas 2019, Kris Jenner gave Kylie Jenner's daughter, Stormi, a playhouse. But this is no ordinary playhouse. It's life-size and has appliances, a balcony, an outdoor patio, a functioning air-conditioning unit and a fake fireplace. Kris and Kylie revealed the new digs in a YouTube video, where Kylie said the mini mansion reminds her of the playhouse she had growing up. Nicole Kidman's flat in New York City has a lift for her car In 2010, the actress and her husband, Keith Urban, bought a flat in Chelsea for US$10 million. The flat is 3,248 sq ft and has three bedrooms, 23-ft ceilings, floor-to-ceiling windows and two terraces. But there's one feature that is most notable: the car lift. The lift brings Kidman and Urban's cars straight from the street to the flat door. DJ Khaled's Miami mansion has a wardrobe that was built to fit 500 pairs of trainers After spending US$2.5 million renovating his Miami home, DJ Khaled filled his mansion with some over-the-top amenities, such as 14-carat gold chandeliers, a boat lift, a granite staircase and a private cinema. Most notably, however, the home also includes a huge sneaker wardrobe that can house 500 pairs of shoes. The storage space also has a rolling library ladder so the DJ can access the hard-to-reach trainers. DJ Khaled put the mansion up for sale for US$7.99 million in December 2018 but it didn’t sell, and in March 2020 he lowered the price to US$5.99 million. How did entrepreneur Chen Yuheng become a CEO at age 13? Kim Kardashian and Kanye West's minimalist home is known for its bathroom sinks Kim Kardashian and Kanye West have multiple homes, but their mansion in Hidden Hills, California, is their prime residence. The 15,667-sq-ft mansion cost US$20 million and is known for its minimalist, white decor. In April 2019, however, the home went viral after Kardashian showed off her bathroom sinks in Vogue's 73 Questions video. The internet was completely baffled as to how the flat sinks worked – but she later explained they had a slight slope that guided the water into a slot, which served as a drain. It's estimated that the sinks could cost more than US$20,000. Oprah's ski chalet in Colorado has a wine room that resembles a mining cave In 2016, Oprah bought a US$14 million, 8,700-sq-ft ski chalet in Telluride, Colorado, and it's filled with some wild features. The house includes a US$70,000 limestone bathtub, a private spa and a hot tub. Most notably, the house also has a wine cave, which is 56 feet long and holds 1,600 bottles of wine. There's an old mining cart down there that runs on rails. It cost US$240,000 to install the cave in the media mogul's house. However, Oprah's main residence is in Montecito, California, and it has its own teahouse In 2001, Oprah bought a 42-acre estate in Montecito, California, for US$52 million, and it's now dubbed “The Promised Land”. The estate has six bedrooms, 14 bathrooms, two theatres, a wine cellar and a barn. The estate even comes with its own teahouse, which is where the media mogul goes to read, meditate and, well, drink some tea. Meanwhile, Jennifer Lopez’s house has its own private vineyard Jennifer Lopez bought her mansion in Bel Air, California, for US$28 million. The house is 14,000 square feet with seven bedrooms and 13 bathrooms. The amenities of this estate are incredible, such as the 30-person home theatre, an amphitheatre, a greenhouse, a swimming pond, a private beach and a massage room. The estate even has its own vineyard. Coronavirus baby boom? 5 celebrity couples expecting by the end of 2020 Bill Gates' US$127 million mansion has a trampoline room Located in Medina, Washington, Bill Gates' mansion is known as Xanadu 2.0 and it has some wild amenities and features. For example, the house has 18.75 bathrooms, six kitchens, an underwater music system in the pool, a reception hall and a home theatre. There's also a trampoline room with 20-foot high ceilings as part of the home's 2,500-sq-ft exercise facility. Paris Hilton spent more than US$300,000 to build a separate mansion for her dogs While dog houses are common in most backyards, Paris Hilton took hers a step further. In the backyard of her Los Angeles mansion, she has a smaller mansion next to her pool for her five dogs. The smaller mansion is two floors and has a second-floor balcony. The Spanish-style kennel cost the social media and reality star US$325,000. Shaquille O'Neal has an oversized mansion in Orlando, Florida, which includes a 30-ft-wide bed Former NBA player Shaquille O'Neal bought a 31,000-sq-ft mansion in 1993, and everything inside is fit for a basketball player. The chairs in the dining room are oversized and the fireplace stretches two stories high. Most bizarrely, the home includes a 30-ft-wide bed, which has a Superman logo on the bedspread. Shaq spent 25 years in the house, but he put it up for sale in 2018 for US$28 million, according to Realtor.com. John Travolta's house has a private airport where he can take off and land a plane right in his front yard Actor John Travolta is a member of a private aviation community known as Jumbolair. The 550-acre community in Ocala, Florida, has the largest private runway in the US, which can accommodate a Boeing 737. Travolta, who is also a licensed pilot, has lived in the community with his wife, Kelly Preston, for years. In fact, there are two runways that lead to the actor's house where he can take off and land his private planes. Revealed: Thailand’s 5 richest billionaires … after King Rama X, of course Lady Gaga's Malibu house has a bowling alley in the basement When Bradley Cooper convinced Lady Gaga to star alongside him in A Star is Born , he did so at her Malibu mansion. The US$22.5 million home was also the backdrop for the musician's Netflix documentary, Five Foot Two . The home has dozens of amenities, including a private terrace and a large eat-in kitchen. But the real surprise is the two-lane bowling alley in the basement, which you can only access through a secret door in the living room, according to Realtor.com. The basement also has a cinema, a wine cellar and a bar. Taylor Swift had an indoor swimming pool in the basement of her New York City home While most homes in New York City are tight on space, Taylor Swift managed to get a pool in the basement of her West Village flat. The pool stretches 30 feet and has a chandelier hanging above. The 5,500-sq-ft town house also has four bedrooms and six full bathrooms. The house sold in 2019 for US$11.5 million. Celine Dion once had a private water park on her estate The musician once owned a 20,000-sq-ft home in Jupiter Island, Florida, which had 13 bedrooms and 14 bathrooms. The home also had a golf simulator, a tennis court and a guest house. But the house's wildest feature was actually in the backyard – a water park, which included two pools, two water slides, water cannons and a lazy river. The house sold for US$38.5 million in 2017 after being on the market for four years. Like Celine Dion, Tiger Woods' home is on Jupiter Island, but his property has a four-hole golf course In 2006, Tiger Woods bought 12 acres on Jupiter Island, Florida, for US$40 million. On the property, there is a 9,000-sq-ft house that has a gym, a media room, a running track and a wine cellar. Perhaps most impressive, the property also has a four-hole golf course so the athlete can practice golf at home. Tommy Hilfiger's penthouse in the famous Plaza Hotel in New York had an Eloise-inspired room The Plaza Hotel is arguably the most famous hotel in the country, and many celebrities have called it home at one time or another. When Tommy Hilfiger lived in the penthouse, it was expertly decorated and included Plaza-inspired decor and furniture. The hotel is also known as the setting for the children's series Eloise at the Plaza , so it's fitting that Hilfiger made an entire room dedicated to the character. It's called the Eloise Dome because it sits in a domed-shaped room. He even had the series' original illustrator draw on the room's walls. In 2019, the penthouse sold for US$31.25 million. Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter . This article originally appeared on Business Insider .