For as long as there have been celebrities, there have been stories about their extravagant spending. Many of these stories are just urban legends, but many others are true, and while the average Joe may respond to them with contempt, make no mistake, it's contempt laced with bitter jealousy.

Fashion Fix CEO Christie Maruka is a celebrity stylist and personal shopper who has conducted such transactions on behalf of her clients. Her signature appears on an abundance of confidentiality agreements, so she can't name any names. However, salespeople are not bound by such agreements, and she said that they're often the source of these stories.

"Sales people immediately turn to their many social media sites," she said. "They post a picture, they write about it, they Instagram it. … Then it gets back to the designer, who'll make an 'as seen on' ad campaign."

So why do the celebrities make these purchases in the first place if they don't want anyone to know what they paid?

"They want to be the one to have it first," Maruka said. "They take to Twitter, Facebook, Instagram, and it gives the impression that they're the leader of the pack in fashion and style."

Read ahead and see some examples of luxury goods purchased with extraordinary sums of celebrity cash.

—By CNBC's Daniel Bukszpan

You can dream big, but they live large! See how one percent of the one percent have 100 percent of the fun! The Filthy Rich Guide premieres Oct. 8 at 10 p.m. ET.

In a long-ago time known as 2011, an iPhone would not bend when thrust into tight pants pockets. It was a sturdy appliance built to last, and its durability was a given.

It was during this heady time that fashion designer Victoria "Posh Spice" Beckham got one made with 150 grams of 24 karat gold. According to Us magazine, it set her back $33,000. Hopefully all the games of "Candy Crush" made up for it.

Blue Ivy, the daughter of musicians Jay-Z and Beyonce, didn't have to wait to be born to be showered in luxury items. In 2011, while she was still just a celebrity fetus, Beyonce's former Destiny's Child bandmate Kelly Rowland bought her a Baby Diamond Bathtub, bejeweled with Swarovski crystals.

According to ABC News, the price was $5,200. It was adorned with over 44,000 crystals that designer Lori Gardner painstakingly applied by hand.

According to The Telegraph, Oscar-winning actor Nicolas Cage left a 2007 auction as the winner of a Tyrannosaurus bataar skull. He had outbid fellow actor Leonardo DiCaprio, but the honor was a costly one that set the "Captain Corelli's Mandolin" star back $276,000.

In 2013, the U.K. newspaper reported that the 67-million-year-old relic might have been stolen. The source of the skull was one Eric Prokopi, a smuggler who pleaded guilty to conspiracy and transportation of goods converted and taken by fraud, according to The Associated Press. It remains to be seen if the actor will get to keep his oversized fossil or not.

When you're the billionaire co-founder of Microsoft, it's OK to treat yourself to a little something from time to time. Paul Allen, whose net worth is $17.1 billion, did exactly that by building a collection of fully restored World War II fighter planes.

Allen has never disclosed the value of his collection, but Mark Clark, president of Courtesy Aircraft Sales in Rockford, Illinois, was willing to take a stab at it

"Certainly millions would get you started," he told Forbes magazine. "Whatever the price, it has an 'm' in front of it."

Stefani Germanotta, otherwise known as Lady Gaga, is a fervent believer in the supernatural. According to VH1, she spent $50,000 on electro-magnetic field readers to detect ghosts, which she believes lurk backstage at her concert venues. She should know, since she believes that she is the reincarnation of her deceased aunt.

"My father's sister Joanne died when she was 19 and he was 16," she told Vanity Fair. "And when my mother was engaged to marry my father, they were staying in his house, where he grew up. ... She believes that Joanne came into the room and sort of OK'd her for my dad and that Joanne transferred her spirit into my mom. … So, when I was born, it's almost as if I was her unfinished business."

The Filthy Rich Guide is a fast-paced guide to how the .00001 percent spend their money. From the entrepreneur who ran up a $500,000 bar tab to the junk bond king with 39 bathrooms and the casino owner who's paying to be cryogenically frozen, this series is an inside look at a world where the party never ends, the cash always flows and the toys are the biggest in the world.

The Filthy Rich Guide premieres Oct. 8 at 10 p.m. ET.

Real estate magnate Donald Trump likes to have his name emblazoned on his property, as his many high-rises, golf courses and casinos attest. This also applies to the $100 million private jet that bears the mogul's last name on its fuselage in gold.

According to the New York Post, the Boeing 757 he bought from Paul Allen can seat 43 passengers, has gold faucets, suede ceilings and a private bedroom, complete with 52-inch flat screen TV. What better place to watch The Donald fire The Situation on "The Apprentice?"

"Tik Tok" singer Ke$ha knows the value of showmanship. Specifically, she knows the value of all the glitter that she deploys at her concert performances, telling Vanity Fair in a 2011 interview that the amount of money she spends on it is "pretty exorbitant… like a few thousand every month."

The singer said that during her shows, "I am shooting glitter from glitter guns and out of every orifice in my body." She also revealed on "Jimmy Kimmel Live!" that she retains the services of a dedicated specialist by the name of Santa, whose sole job is to ensure that she remains shiny at all times.

"He just follows me around and makes sure I'm always covered in glitter, because I feel it would be seriously a disappointment if I was ever seen without it," she told Kimmel.

In 2009, Life & Style magazine reported that hotel heiress and socialite Paris Hilton had a mansion built for her six dogs, at a cost of $325,000. Among its amenities were such canine-friendly features as a crystal chandelier, a balcony and central air conditioning.

Fast forward five years, and New York magazine reported that the canine abode had been given a long overdue upgrade. In addition to the crown molding and closet, the 300-square-foot residence was given a flat screen TV, leaving the dogs free to binge-watch "Orange Is The New Black" on Netflix.

The Lana Marks Cleopatra alligator clutch is a $100,000 accessory that's about as limited as it gets. Festooned with 1,500 round diamonds, only five are made per year, and just one is made specifically for a single actress. In 2004 that actress was Charlize Theron, who brought it to that year's Oscars. According to Maruka, the appeal of this kind of accessory is less the price than the exclusivity.

"Handbags like this are made from rare leather and exotic skins, and because they are limited editions and only a very few are made, celebs like Charlize want to have it," she said. "It's all about who can get it first, and once it's copied or knocked off, no one wants it."

In 2000, singer Celine Dion entered into a three-year, $100 million deal with Caesars Palace in Las Vegas to perform there exclusively. For the performances, a facility called Colosseum was specially built, at a cost of $95 million.

The astronomical cost was due in part to a $2 million contraption that the Las Vegas Sun called a "misting sprayer", which would hang above her head while she performed. This actually served a practical purpose, as it preserved her singing voice in the harsh desert climate. "Think of it as a $2 million humidifier," the newspaper said.

The Filthy Rich Guide is a fast-paced guide to how the .00001 percent spend their money. From the entrepreneur who ran up a $500,000 bar tab to the junk bond king with 39 bathrooms and the casino owner who's paying to be cryogenically frozen, this series is an inside look at a world where the party never ends, the cash always flows and the toys are the biggest in the world.