On Hollywood's biggest night, anything can happen—and it feels like nearly everything has. 

With the 2020 Oscars set to unfold inside the Dolby Theater in Los Angeles on Sunday for the 92nd time in Tinseltown history, there are a few things we know for sure will take place. Hollywood's brightest, beloved stars will arrive donning designs that will be remembered for years to come. They will pose on the red carpet, answer questions in interviews and then proceed inside, where they may present or win a coveted trophy. Beyond all that, your guess is as good as our's. 

Given the 91 ceremonies to come before it, pop culture enthusiasts know some Oscar moments are simply and inevitably unpredictable. In the course of the show's star-studded history, there have been name flubs and falls, surprise smooches, a streaker and swan dress, double the wins and even the wrong winner called. 

There was the time Marlon Brandoboycotted, when Kevin Hart stepped down as host and when Lady Gaga and Bradley Cooper's on-stage chemistry got the rumor mill churning

But, if you can't remember all the details, not to fret! To jog your memory of the biggest shockers in Oscars history, keep scrolling for E!'s cheat sheet gallery below! 

Bradley Cooper, Lady Gaga, 2019 Oscars

Ed Herrera via Getty Images

Kevin Hart, Today

Nathan Congleton/NBC

Warren Beatty, Moonlight, 2017 Oscars

MARK RALSTON/AFP/Getty Images

 Idina Menzel, John Travolta, 2015 Academy Awards Oscars

ROBYN BECK/AFP/Getty Images

2013 Oscars Show, Jennifer Lawrence

Kevin Winter/Getty Images

Paul Haggis, Oscar

AP Photo/Jennifer Graylock

Adrien Brody, Halle Berry, 2003 Oscars

John Lazar/WireImage.com

Bjork

SGranitz/Getty Images

Angelina Jolie, James Haven, 2000 Vanity Fair Oscar Party

Alec Michael/Globe Photos/ZUMAPRESS.com

Shakespeare in Love, Gwyneth Paltrow

Miramax

Cher, 1986 Oscars, Dresses, OMG Oscars Looks of All-Time

Michelson/ZUMApress.com

David Niven, Streaker, Most Shocking Oscar Moments

AP Photo

Charlie Chaplin, Most Shocking Oscar Moments

Bettmann/Getty Images

Sacheen Littlefeather, Marlon Brando, Most Shocking Oscar Moments

Bettmann/Getty Images

Barbra Streisand

YouTube

Sammy Davis Jr

YouTube

Watch E!'s red carpet coverage of the 2020 Oscars Sunday, 9th Feb starting at 10pm followed by the Red Carpet Rundown: 2020 Oscars at 12:30am! Then see the star-studded Oscars ceremony itself, over on Sky Cinema from 1am, on Sky & NOW TV.

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