If you're a celebrity, you'll know drama isn't just for the big screen. When you're famous, you'll often be introduced to other people in the industry who you just don't click with, which could eventually evolve into a full out feud.
From simple disagreements to massive, ongoing arguments, these stars teach us how not to treat our peers, regardless of the situation.
But it wouldn't be Hollywood if everyone got along, so here are 10 outrageous celebrity feuds that'll make you thankful for having a solid group of friends.
1. Tom Cruise vs. Brooke Shields
In 2005, Tom Cruise made waves after he criticized Brooke Shields for using antidepressants to treat her postpartum depression.
He told Access Hollywood that it's "irresponsible" for the supermodel to claim medication has cured her, adding that she should have turned to healthier alternatives such as exercise and vitamins.
"When someone says (medication) has helped them, it is to cope, it didn't cure anything. There is no science. There is nothing that can cure them whatsoever," Cruise said.
"I care about Brooke Shields because I think she is an incredibly talented woman, (but) look at where her career gone," he added.
Shields didn't take the insult lying down and wrote an op-ed for The New York Times to discuss the hardships of suffering from the mood disorder.
"I'm going to take a wild guess and say that Mr. Cruise has never suffered from postpartum depression," Shields said.
"To suggest that I was wrong to take drugs to deal with my depression, and that instead I should have taken vitamins and exercised shows an utter lack of understanding about postpartum depression and childbirth in general," she continued.
Eventually the Mission Impossible actor saw the error of his ways and went over to Shield's home to offer a sincere apology, which she accepted.
2. Gwyneth Paltrow vs. Martha Stewart
Known as one of the most prominent lifestyle gurus in the 21st century, Martha Stewart isn't afraid to voice her opinion on her competitors, which include Gwyneth Paltrow and her lifestyle brand, Goop.
"She just needs to be quiet," Stewart told Porter Magazine in 2014. "She's a movie star. If she were confident in her acting, she wouldn't be trying to be Martha Stewart."
Stewart would take the unexpected diss one step further when she shared a recipe for a pie she named "conscious coupling" - mocking the split between the Shakespeare in Love actress and her then-husband Chris Martin.
But it wouldn't be long until Paltrow hit back by posting her own dessert recipe dubbed "jailbird cake," which took a jab at Stewart's five month jail sentence for fraud.
3. Elton John vs. Madonna
Since these two Grammy Award-winning singers have been known as frenemies for years, it's no surprise that there would be some badmouthing in the press.
In 2002, Elton John started the feud when he claimed Madonna's song "Die Another Day" for the 007 movie series was "the worst Bond theme ever."
When the "Tiny Dancer" singer accepted the Classic Songwriter Award at England's Q Awards, he further insulted Madonna for even being nominated in the same category as him.
"Madonna, Best Live Act? F*ck off. Since when has lip-syncing been live? Sorry about that, but I think everyone who lip-syncs on stage in public when you pay like 75 quid to see them should be shot. Thank you very much. That's me off her Christmas card list, but do I give a toss? No," John said.
A few years later, John would say even more callous words when he was asked about the "Vogue" singer.
"Why is she such a nightmare?" John said during an interview with an Australian television show. "Sorry, her career is over. Her [MDNA] tour has been a disaster and it couldn't happen to a bigger c*nt."
"And she looks like a f*cking fairground stripper," he added.
The feud would eventually end in 2012 when John saw Madonna walk into the restaurant he was eating at and offered to buy her dinner and apologized for his decade-long stream of insults.
4. Kanye West vs. Taylor Swift
Who could forget the infamous rift between Kanye West and Taylor Swift? It all started when the "Gold Digger" rapper jumped on stage at the 2009 MTV's Video Music Awards while Swift was in the middle of delivering her acceptance speech and said Beyonce should have won the award for best "Female Video" instead.
It wouldn't be long until West apologized to the "You Belong With Me" singer and the two seemed to patch things up. But in 2016 their fragile friendship would ultimately be destroyed when West released his song "Famous," which featured the lyrics "I feel like me and Taylor might still have sex / Why? I made that b*tch famous."
Swift would be exceptionally vocal about her disdain for the lyrics and said West's words undermined her success as an artist.
The drama continued when Kim Kardashian came to her husband's defense and revealed she had proof Swift had approved the lyrics months ago, showing she was only feigning disgust.
Fans would side with West and Kardashian and would post thousands of snake emojis on all of Swift's Instagram pictures in solidarity.
5. Sinead O'Connor vs. Frank Sinatra
This wild feud began in 1990 when Sinead O'Connor threatened not to perform at the New Jersey Garden State Arts Center when she was asked to sing the national anthem before her show began.
She told the L.A. Times "she has a policy of not having national anthems played before my concerts in any country, including my own, because they have nothing to do with music in general."
When Frank Sinatra caught wind of O'Connor's refusal, he told his fans during his performance at the same venue that he'd "like to kick her in the a**!"
Of course, the "Nothing Compares 2U" songstress would get the last word in when she told Esquire Magazine "I can't hit this man back, he's like 78 years of age, and I'd probably kill him."
6. Donald Trump vs. Rosie O'Donnell
Before he became the 46th President of the United States, Donald Trump was just a millionaire business man who liked to cause drama.
Back in 2006 O'Donnell was a co-host on The View, where she spoke out against Trump's decision to allow Miss USA, Tara Connor, to keep her crown despite her drug use coming to light.
She told the viewers Trump is "not a self-made man" but rather a "snake-oil salesman on Little House On The Prairie."
She also blasted him for his multiple marriages "[He] left the first wife -- had an affair. [He] had kids both times, but he's the moral compass for 20-year-olds in America. Donald, sit and spin, my friend."
Of course, Trump immediately shot back: "I'll most likely sue her for making those false statements -- and it'll be fun. Rosie's a loser. A real loser. I look forward to taking lots of money from my nice fat little Rosie."
Their war of words would carrying to the present day, as O'Donnell continues to be a staunch opponent to her nemesis's presidential term. When Trump was elected, she immediately tweeted: "god help us all." and "i am not scared - i am sad - for all of us - for humanity."
7. Jada Pinkett Smith vs. Gabrielle Union
It may come as a shock to most of you, but it turns out Jada Pinkett Smith and Gabrielle Union had been in a secret feud for 17 years.
When Union made a guest appearance on Pinkett Smith's new show, Red Table Talk, the pair decided to bury the hatchet.
"I have a really touching episode with Gabrielle Union," Pinkett Smith said. "We haven't been on the best of terms for 17 years and we have a reconciliation."
"When the producers said we want to do a girlfriends show, her name just kept coming up. It just couldn't be anything else," she added.
Funny enough, Pinkett Smith said she and Union "don't even know how it started."
I suppose all's well that ends well.
8. Katherine Heigl vs. Shonda Rhimes
In 2008 all hell broke loose when Katherine Heigl declined her Emmy nomination for her role as Dr. Izzy Stevens in Grey's Anatomy.
"I did not feel that I was given the material this season to warrant an Emmy nomination and in an effort to maintain the integrity of the academy organization, I withdrew my name from contention," Heigl told the Gold Derby.
When the show's creator, Shonda Rhimes, heard Heigl's unflattering statement, she decided it would be best to write out Heigl's popular character.
"On some level, it stung and on some level I was not surprised," Rhimes said in an interview for Oprah's Next Chapter. "When people show you who they are, believe them."
In 2012, the Knocked Up star said she'd love to return to the medical drama, but Rhimes quickly shot the idea down.
"It was really nice to hear her appreciating the show," Rhimes said. "We are on a track we have been planning, and the idea of changing that track is not something we are interested in right now."
9. Madonna vs. Gwyneth Paltrow
It shouldn't be a surprise to see Madonna and Paltrow making a second appearance on this list.
In the mid-2000s, these two stars were inseparable. They appeared to be attached to the hip as they were frequently spotted doing mundane activities together such as getting lunch, to attending major events, such as high-profile fashion shows.
While they haven't outwardly spoken about what caused their falling out, it's rumored to be about their shared personal trainer, Tracy Anderson.
It's alleged that when Madonna fired Anderson she told Paltrow she should follow her lead, but when the Iron Man actress refused, Madonna didn't hesitate to cut her out of her life.
While she didn't name names, in 2010 she told British Vogue: "I'm having a situation right now with a friend where I'm feeling pretty angry."
10. Sylvester Stallone vs. Richard Gere
If you ever wanted to see a movie featuring both Sylvester Stallone and Richard Gere, you might be waiting for a very long time. These two talented actors were almost co-stars in the 1974 film, The Lords of Flatbush, but couldn't stand each other on set.
"We never hit it off," Stallone said in 2006. "He would strut around in his oversized motorcycle jacket like he was the baddest knight at the round table."
To add fuel to the fire, the pair got into a physical fight over chicken grease.
"I was eating a hot dog and [Richard] climbs in with a half a chicken covered in mustard with grease nearly dripping out of the aluminum wrapper," Stallone explained.
"I said, 'That thing is going to drip all over the place.' He said, 'Don't worry about it.' I said, 'If it gets on my pants, you're gonna know about it.' He proceeds to bite into the chicken and a small, greasy river of mustard lands on my thigh. I elbowed him in the side of the head and basically pushed him out of the car," the Rocky actor added.
Gere would eventually be cut from the movie since the two actors couldn't continue filming together.
"The director had to make a choice: one of us had to go, one of us had to stay. Richard was given his walking papers and to this day seriously dislikes me," Stallone concluded.
Want to read more juicy stories involving celebrity drama? Here are more famous feuds that date way back:
- Famous Costars Who Actually Hated Each Other In Real Life
- Lost Interview With Joan Rivers Reveals Her Decades-Long Feud With Johnny Carson
- Feud Between Jamie Oliver And Gordon Ramsay Reaches Boiling Point