Not everyone sees a prenuptial agreement as a necessary part of marriage, but in Hollywood, there can be quite a lot at stake if things don't turn out happily ever after. Let's be honest, more celeb marriages fail than succeed. There can be massive amounts of money at play in celebrity marriages, and with so many celebs having a history of bad behavior, sometimes their spouses try to lock them down by putting unique stipulations into their prenups. Even if their spouses don't stay faithful (or off drugs, etc), they can at least make some money from their distress. Here are 13 of the most interesting celebrity prenups out there, from both marriages that didn't last and at least a couple that have.

13 Justin Timberlake And Jessica Biel

Justin Timberlake and Jessica Biel agreed to a deal where Justin would owe her $500,000 if he cheats on her. There were rumors that the two weren't getting along as they hashed out the details of their prenup, but now they have been married since 2012 without incident and have a son named Silas together.

12 Jay Z And Beyonce

If Beyonce and Jay Z ever get divorced, Queen Bey would not only be owed one million dollars for each year of their marriage, but an additional five million for each child of his she gave birth to. The duo were rumored to be going through marital trouble and heading for divorce after rumors flew that Jay Z was cheating on her with people like Rihanna. The elevator incident where Beyonce's sister attacked Jay Z didn't help squash the rumor mill, but the couple hasn't had any public issues since and seem as happy as ever.

11 Khloe Kardashian And Lamar Odom

Khloe and Lamar signed a prenup that entitled Khloe to $500,000 for every year the two were married should their marriage dissolve. She also would get the house, a car at the end of each lease term, $6,000 each month for beauty and upkeep, and an additional $25,000 for support. The two were in the middle of their divorce proceedings when Lamar was found unconscious in a Las Vegas brothel. Khloe put a stop to the legal proceedings to focus on his health.

10 Priscilla Chan And Mark Zuckerberg

Priscilla Chan got Mark Zuckerberg to sign a document back when they were dating that stated that she was owed “One date per week, a minimum of a hundred minutes of alone time, not in his apartment and definitely not at Facebook.” We don't know the exact details of their prenup, but it's safe to assume that they have one since Mark is worth billions of dollars. The college sweethearts staged a surprise wedding and their guests thought it was a graduation party.

9 Tom Cruise And Katie Holmes

When Tom Cruise and Katie Holmes got married their prenup included some incentives to keep her around as long as possible. The prenup said that for each year that they were married she would be entitled to $3 million, but if she could last past 11 years then the prenup would be voided and she would be entitled to split everything. Their marriage only lasted five years, but that should have been long enough to get her $15 million personally, plus $400,000 a year in child support for their daughter Suri. Suri also got a trust, and Katie got to keep jewelry and purses that were worth millions.

8 Jessica Simpson And Tony Romo

When Jessica Simpson and Tony Romo were working out their marriage agreement, Tony supposedly wanted to include a "porker clause" that would prevent Jessica from ever weighing above 135 pounds. For each pound over 135 she gained he wanted to be awarded $500,000. Luckily for her, the two never made it down the aisle. Today Jessica is married to a different former NFL player, Eric Johnson, who is probably a little nicer and the father to her children Ace and Maxwell. Oh, and she looks better than ever.

7 Britney Spears And Kevin Federline

When it came to the prenup of Britney Spears and Kevin Federline it wasn't so much what was in the legal details of a potential split but what wasn't. The two signed a prenup that was 60 pages long and ensured that when they split Kevin only walked away with a million bucks. For the average person that's quite a hefty sum, but without an iron clad prenup, Kevin could have landed half of the $65 million that Britney was worth at the time. The two have two children together, and Kevin has four others with other women as well.

6 Charlie Sheen And Denise Richards

When Charlie Sheen and Denise Richards got together, she made sure to get an infidelity clause in their prenup where she would get an extra $4 million if he cheated on her during their marriage. Although she won the cash in the divorce, it doesn't sound like everything was peaceful afterwards, since he reportedly later kicked her and their kids out of a house that he bought for them. When Charlie was planning to marry porn star Brett Rossi he supposedly wanted to throw out the fancy prenup idea and just go with the concept of “You keep your sh** and I’ll keep mine.”

5 Keith Urban And Nicole Kidman

When Keith Urban and Nicole Kidman got married in 2006, they agreed to a prenup clause that said if they got divorced, Keith would get $640,000 for each year of marriage. However, that clause would be invalid if he did drugs. Keith entered a rehab facility a mere four months after the two tied the knot, so it's unclear if he's still entitled to anything. While Keith has admitted it wasn't great to be dealing with addiction at the beginning of a marriage, he did feel like it brought them closer together and ultimately strengthened the relationship.

4 Tiger And Elin Woods

When Tiger and Elin got married, their prenup said that Elin would get $20 million for each ten year period that the two were married. But since Tiger was cheating on Elin she demanded a rewrite. Tiger ended up offering her $200 million if she would stick around, but she left him. Some reports say that he ended up giving her as much as $750 million to keep silent about the details of their marriage. In 2014, she broke her silence on their 2010 divorce: "I have moved on and I am in a good place. My relationship with Tiger is centered around our children and we are doing really good and I am so happy that is the case. He is a great father."

3 Catherine Zeta Jones And Michael Douglas

Michael Douglas has a history of infidelity so when he married Catherine Zeta Jones, she made sure to protect herself legally. If the two get divorced, she would get $2.8 million for each year of marriage as well as a $5 million dollar bonus if he got caught cheating. The two have been married however for 15 years already and don't sound like they're giving up anytime soon. They took a break in 2013 around the time that Michael Douglas said his throat cancer was caused by HPV that came from oral sex, but now they seem stronger than ever.

2 Steven Spielberg And Amy Irving

When Steven Spielberg was getting married to Amy Irving the two wrote out their prenup on a cocktail napkin. This did not hold up in court when the two were in the process of getting divorced in 1989, partly because they had no legal counsel present at the time. Steven was leaving her to date Kate Capshaw, and Amy was awarded half of Steven's fortune and ended up with $100 million.

1 Mel Gibson And Robyn Denise Moore Gibson

Mel Gibson and Robyn Denise Moore Gibson have one of the craziest prenup stories of all time... because they didn't have one. The two ultimately separated over "irreconcilable differences" and were ordered to split Mel's fortune straight down the middle. At the time he was worth a truly amazing amount of $900 million, which means that Robyn walked away with a cool $425 million. This is on record as the largest celebrity prenup payout in history. Surely Mel hasn't forgotten.

sources: etonline.comdailymail.co.ukforbes.com

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