The Oscars

Justin Bieber passed on a tux, a suit and tie or even a blazer for an Oscar after-party he attended ... opting instead for Old Navy.

Paps got the Biebs Sunday night outside of the Vanity Fair Oscar party in Bev Hills, and he looked ... well, about as dressed up as you'd expect.

Ryan Gosling laughed off the epic Best Picture screwup ... genuinely finding it hysterical.

Check out his expressions as defeat was snatched out of the hands of victory.

Vanity Fair flexed some serious muscles for its after-party ... with one huge celeb after another rolling through.

Warren Beatty's got a new BFF Monday morning -- Steve Harvey's suddenly showing him all kinds of love for giving people a new epic live TV blunder to harp on, instead of Steve's.

Steve shared his perspective on the Oscars Best Picture screwup ... which, of course, reminded everyone of Steve's historic Miss Universe screwup.

The botched Best Picture screwup was the only thing celebs like James Marsden, Lisa Bonet, Alice Eve and others were talking about after the Oscars.

We got 'em all over town, and we'll say this ... the Oscar for Best Reaction to an Oscar Screwup goes to Sting and Trudie Styler!

Warren Beatty brought proof to the Governors Ball HE didn't screw up the Oscars ... but the proof fell a tad short.

Warren hobnobbed with a slew of stars, envelope in hand, showing everyone the envelope he was given was for Best Actress. Thing is ... had he looked, it would have been apparent from the get-go.

Emma Stone only rolls with the best ... and it doesn't get any better than an Oscar and a wave of her smoking hot friends!

The Best Actress winner -- gold statue in hand -- was leaving the "La La Land" after-party at the SoHo Sunday night. You gotta see the line of beauties hopping into their waiting ride.

T.O. got jokes.

After that epic Oscars fail Sunday night ... even Terrell Owens took a shot at the Academy.

"After watching the #Oscars2017 Moonlight snafu, maybe I did make the the #HOF2017 class. 😂😂😂 #moonlightgate."

Warren Beatty and Faye Dunaway pulled a Steve Harvey -- announcing "La La Land" won Best Picture, when it was really supposed to go to "Moonlight" ... and the fallout was hysterical.

In the greatest Oscars ending ever ... Warren and Faye called the 'La La' crew up onstage -- and they were several minutes into their acceptance speeches before someone figured out the massive screwup.

If you missed it you gotta see how it played out -- stage managers looked like Keystone Cops running around onstage. To their credit, the 'La La' folks graciously handed over their Oscars when the "Moonlight" cast and crew came up.

As for what went wrong? Watch ... Warren's explanation is an instant Hollywood classic, but basically he and Faye were handed the wrong card -- the one for Emma Stone's Best Actress win ... which had been handed out just before Best Picture.

Price Waterhouse just explained the obvious ... "The presenters had mistakenly been given the wrong category envelope and when discovered, was immediately corrected." Truth be told, not immediately. Also, why were there 2 "Best Actress" cards?

And get this -- Leo DiCaprio might be unwittingly involved! Best we can tell ... he walked off the stage holding Emma's envelope after her acceptance speech. We don't know what happened backstage, but somehow that card -- or a duplicate of it -- ended up in Warren and Faye's hands.

You are not alone, Steve Harvey.

Most celebs at the 89th Academy Awards did NOT win an Oscar statuette, but they still tried like hell to win when it comes to dressing for the occasion.

Nominees like Meryl Streep, Denzel Washington, Viola Davis, Ryan Gosling, Nicole Kidman, Justin Timberlake, and Janelle Monae came dressed to the nines, as did a ton of other celebs ... whether they were up for awards or just attending.

Naomie Harris was happy enough her movie won Best Picture, but she clearly feels the pain of the "La La Land" cast and crew.

The Iranian director who was almost banned from attending the Oscars because of Donald Trump's travel ban blasted the Prez after he won Sunday ... but did it in writing.

Asghar Farhadi had a rep read a statement after winning the Best Foreign Film award for his movie "The Salesman" ... in which he explained his absence.

Farhadi -- who's won an Oscar before -- said he is standing in solidarity with his own country -- as well as the other 6 in Trump's now-blocked EO -- to protest the ban.

Since the ban was nullified by the courts, he could have attended had he wanted.

Jimmy Kimmel took a huge sarcastic swipe at President Trump ... all in support of some up and coming actress named Meryl Streep.

In the middle of Jimmy's opening monologue for the 89th Oscars he put the spotlight on Meryl by referencing Trump's "over-rated" tweet about her ... following her scathing speech about him in January.

Jimmy's obviously killed in what's definitely NOT a Trump-friendly room.

Ya gotta imagine Trump's Twitter finger is itching.

Part of the Oscars stage was left in shambles Sunday morning when a prop crashed down during rehearsals ... and TMZ got this photo of the damage.

The accident happened around 11:30 AM on the stage at the Dolby Theatre -- just hours before the award show was set to begin. We're told host Jimmy Kimmel was working out a skit at the time, but was off the stage.

The props, which appear to be skyscraper models, tumbled over and crushed a camera. We're told no one was injured though. One witness described it as making a "horrifying sound" as it tore down the curtain.

The show is set to begin at 5:30 PM PT ... so we're guessing there's a lot of scrambling going on to get things fixed. We've got a call in to the Oscars and ABC ... no word back yet.

Tons of stars showed up Saturday night for a pre-Oscars bash.

Janelle Monae, Jamie Dornan, Nicole Kidman, Michael Keaton, Naomi Watts, Hailee Steinfeld, Oliver Stone, Rachel Zoe and others hit up the Charles Finch and Chanel party at Madeo Restaurant in WeHo.

Terrence Howard isn't so sure Denzel Washington will bring home the Oscar, because he says he deserved it back in the day but went home empty.