Neil Patrick Harris, 2015 Academy Awards, Show

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Lights, camera, action!

It's Hollywood's biggest night of the year and host Neil Patrick Harris started the evening off with, what else, a memorable song-and-dance number with help from Jack Black and Anna Kendrick.

The 87th Annual Academy Awards, which were held at Los Angeles' Dolby Theatre, began by first honoring the winner for Best Actor in a Supporting Role, which went to none other than J.K. Simmons for his role in Whiplash.

Shortly thereafter, Adam Levineshowed off his famous pipes while belting out "Lost Stars" from the film Begin Again. Now that's a voice!

Following that, the award for Achievement in Costume Design was given to Milena Canonero for her work on The Grand Budapest Hotel.

The colorful Wes Anderson film also won for the best makeup and hairstyling immediately following Canonero's acceptance speech.

Tim McGraw, 2015 Academy Awards

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The black-and-white Polish film Ida, a period-piece that explores the German occupation during World War II, then won the Oscar for Best Foreign Film.

Things got turned up a notch when the Lonely Island teamed up with Tegan & Sara for a super-bizarre, Lego-themed musical number of "Everything Is Awesome." The female duo sang while a flurry of costumed dancers pranced around them and chimed in. All judgments aside, it was definitely a head-scratching moment that felt more theatrical than anything we've ever seen at an Academy Awards!

And, by the way, if you blinked then you most likely missed the cameo from Will Arnett and Questlove!

Gwyneth Paltrow then introduced Tim McGraw up onto the stage (they co-starred in Country Strong after all!) as he sang Glen Campbell's "I'm Not Gonna Miss You"—a song the country music legend penned for his wife and children as he struggles with Alzheimer's Disease.

Neil Patrick Harris, Academy Awards, Underwear

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Suffice to say, it was an emotional moment for Campbell's wife and kids who were watching from the audience and one of the most touching moments of the show.

NPH then took to the stage in nothing but his tighty whities (hello, Birdman reference!) to present Margo Robbie and Miles Teller—and both, understandably, couldn't help but blush at the site of the night's host in his underwear.

Up next was the award for Best Actress in a Supporting Role, which went to Boyhood's Patricia Arquette.

The actress also won the Golden Globe and Screen Actors Guild award for her performance in the film, which took an astounding 12 years to make.

Arquette took time in her speech to speak out in favor of wage equality for women and "equal rights for all" while Meryl Streep cheered alongside Jennifer Lopez from the front row. Girl power!

Common, John Legend, 2015 Academy Awards Oscars

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Up next was a super dressed-up Rita Ora who sang "Grateful" from the feature flick Beyond the Lights.

Big Hero 6 then took home the trophy for Animated Featured Film tonight, which resulted in a major applause from the crowd. Go, Baymax, go!

Best Production Design went to Anderson's The Grand Budapest Hotel—marking an early night sweep for the beloved indie flick.

The Academy then paid tribute to all of those stars who we've lost including Robin Williams and Mike Nichols, while Jennifer Hudson serenaded the crowd with a song from Smash.

The Oscar for Best Documentary Feature, which was presented by Jennifer Aniston and David Oyelowo, went to the film about Edward Snowden, Citizenfour.

Common and John Legend then gave the crowd a performance of their hit track "Glory" from Selma which brought the crowd to its feet.

Oyelowo was shown standing and crying in the audience, and got support from Oprah Winfrey as he wiped his tears away. Chris Pine also was shown tearing up after the emotional performance as the stars clapped.

Idina Menzel and John Travolta partnered up (and joked about their snafu at last year's Oscars!) to give the Oscar to "Glory" for Best Original Song.

Lady Gaga, Julie Andrews, 2015 Academy Awards, Show

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Scarlett Johansson then introduced fellow New Yorker Lady Gaga to the stage to pay tribute to The Sound of Music. The newly engaged superstar belted out a medley of songs from the famous musical and didn't miss a beat! After the beautiful number, Julie Andrews came out from backstage to surprise the crowd and hugged Mother Monster and we all cried the crowd went wild.

Alexandre Desplat was awarded with Best Original Score for his work on The Grand Budapest Hotel—and side note, he was nominated in the category twice!

The statue for Original Screenplay went to Birdman's Armando Bo, Alexander DinelarisNicolás Giacobone and Alejandro González Iñárritu.

Best Adapted Screenplay, meanwhile, went to Graham Moore for The Imitation Game. His heartfelt speech should've taken home an award in and of itself.

After a short commercial break, Iñárritu went home with yet another trophy after he was named Best Director for Birdman.

Then without any time wasted, Eddie Redmayne accepted the honor of Best Actor for The Theory of Everything.

The actor appeared stunned by the announcement and said, "Oh my God!" as soon as he hit the stage. "I am fully aware that I am a lucky, lucky man," he added.

PHOTOS: First-time Oscar nominees

Julianne Moore, Academy Awards, Winner

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Julianne Moore was then given one of the evening's last awards, when she was Oscar for Best Actress for her groundbreaking performance in Still Alice.

Holding back tears of joy, she joked with the crowd, "I read an article that said that winning an Oscar could lead to living five years longer. If that's true I'd really like to thank the Academy because my husband is younger than me!"

And then, last but in no way least, Birdman was named Best Picture at the 87th Annual Academy Awards.

Oh, what a night! Congratulations to all who were nominated and who went home the big winners!

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