17 unforgettable moments from our favorite guilty pleasure TV show of all time, 'The Hills'

In season 5, Audrina heard from a friend that her former roommate Lauren had recently been hooking up with her on-again-off-again flame, Justin.

Lauren was hurt that Audrina would even believe the rumors and blamed Audrina for the rift. Even after the two talked, Audrina didn't want to acknowledge that she'd messed up.

A season 3 barbecue was just one of the countless times Justin left Audrina in the dust. After spending time with the group at Brody Jenner’s house in Malibu, Justin disappeared without a word.

Lauren shows Audrina the helmet Justin left behind for her. Trying to comfort her friend, Lauren reminded Audrina that she deserves more than a guy who wears combat boots to the beach.

After Kristin Cavallari’s return at Heidi and Spencer's wedding, her "man-eater" reputation ruffles some feathers in the group. An argument broke out between Kristin, Stephanie and Audrina over Justin.

Stephanie even went to far as to express further concerns to the group saying "she's the girl that's going to stab us all in the back and she doesn't care."

Sadly, this was the beginning of the end for Lauren and Heidi’s friendship.

While it seemed like the friendship had started to disintegrate when Heidi met Spencer, Lauren tried her hardest to spend time with her BFF and roomie. Blinded by love, Heidi decided to move in with Spencer and assured Lauren that their friendship would still be just as strong.

But Lauren, ever the realistic one, knew that wouldn’t be the case.  

 This was just one of the many quotable lines from the MTV reality series. When Heidi stops by their old apartment to make amends with Lauren after their epic fight at Les Deux, Lauren refuses to take her back as a friend.

Disappointed in Heidi's choice to stick by Spencer, Lauren basically tells her their friendship is dunzo. 

 In an effort to mend their friendship (again), Heidi, with the help of Spencer's sister Stephanie, crashed Lauren's birthday party.

The two could never really forget about each other and tearfully recounted happy memories of the past. This was yet another part of the roller coaster that was Lauren and Heidi's relationship. 

How could we forget the single black tear that graced Lauren’s face when Audrina came to talk to her? After struggling to find a balance between Audrina and Lo, Lauren began to feel as if Audrina was no longer interested in being her friend.

In an effort to repair the friendship, Audrina and Lauren tried to talk it out—but not without a few tears.

While on a shoot for Teen Vogue and Good Morning America, Whitney stepped in to model Hillary Swank’s 2005 Oscar dress. Poor Whitney got caught on her dress and stumbled in front of all of America.

Jenn Bunny’s birthday was certainly one for the books. After Spencer and Heidi goaded Jenn into leaving with Brody, Heidi denied all involvement to Lauren.

Lauren pointed fingers at Spencer, who she was already not a fan of, and deemed him “a sucky person.” 

Not many who watched the series ever believed that Heidi and Spencer would ever make it down the aisle. Much to the chagrin of Heidi’s family and friends, the couple tied the knot the same episode when Kristin returned and Lauren Conrad made her exit.

After a change of heart and an appearance at Heidi and Spencer’s wedding, Lauren made a quiet exit out the side door of the church.

After five seasons of ups and downs, Lauren’s time on "The Hills" had come to an end.

In season 1, Lauren seemed like she had it all together: a great job, an awesome apartment, cool friends and a loving boyfriend. But, when given the choice between a summer internship in Paris and spending the summer with her boyfriend, Jason, in Malibu, she chooses Jason.

The decision ultimately put her in a difficult position with her Teen Vogue boss and allowed friend and fellow intern Whitney to jump-start her career. And Lauren and Jason's relationship went bust just a few weeks into the summer.

At the start of season 6, Heidi flew home to reveal the results of her ten plastic surgeries. Heidi’s mom was less than supportive of the risky elective surgeries, and found herself at a loss for words.

“It’s very weird and awkward,” she told her daughter. Heidi, who was hurt by her mother’s words, couldn’t even elicit a sob because she was so sore. Ouch.

So, was it all fake?! After a montage of flashbacks from Lo, Kristin, and Audrina that nearly made us cry, the background rolled away from behind Brody to reveal a studio lot.

The tongue-in-cheek ending was producer Adam DiVello's nod to year of debate. Even ten years later, we can’t decide where television ended and real life began.

Three years after the end of season 6, MTV aired an alternate ending that shocked fans of the show everywhere. After seeing off broken-hearted Kristin, Brody returned to his apartment and Lauren Conrad (!!!). Trying to console Brody, LC says “it’s hard to say goodbye.” Wink, wink.

The number one moment from all six seasons was the fight between Lauren and Heidi at Les Deux. After Heidi moved out at the end of season 2, there was a major fallout between the besties.

When the two ran into each other at the club, Lauren accused Heidi and Spencer of spreading a “sick little rumor” about her. Heidi swore up and down she had no clue where it came from, but Spencer recently confirmed that he did, in fact, start the rumor.

While the dramatic ups and downs of "The Hills" are a thing of the past, at least we'll always have MTV Retro reruns.