Oscars: Lady Gaga & Bradley Cooper Sing ‘Shallow,’ Melissa McCarthy’s Bunny Puppet & More Big Moments!

We're breaking down all the biggest moments from the 2019 Oscars!

No host? No problem! The show got off to a rockin' start as Queen took the stage with Adam Lambert at the mic. The group performed “We Will Rock You” and “We Are the Champions” in honor of Best Picture nominee “Bohemian Rhapsody” and late lead singer Freddie Mercury.

Next, Maya Rudolph, Tina Fey and Amy Poehler arrived to deliver a few LOL moments and present Best Supporting Actress to Regina King.

Maya joked, “So just a quick update, in case you're confused: There is no host tonight. There won't be a Popular Movie category. And Mexico is not paying for the wall.”

Tina added, “We are not your hosts, but we're going to stand here a little too long so that the people who get USA Today tomorrow will think we hosted.”

Amy had everyone laughing as she told the crowd, “And we won't be doing awards during the commercials, but we will be presenting commercials during the awards. So if all the winners could please say, 'Hellman's Mayonnaise: We're on the side of food,' instead of speeches, that would be great.”

Another comedic moment… Melissa McCarthy and Brian Tyree Henry presenting Best Costume to “Black Panther.” The duo wore some pretty outrageous outfits inspired by “The Favourite.” In fact, Melissa's dress and train were covered in bunnies and at least one was a puppet! For those unfamiliar, Queen Anne has more than a dozen pet rabbits in the film.

Keegan-Michael Key made a dramatic entrance as he dropped in Mary Poppins-style! The comedian floated in with an umbrella to present Bette Midler singing Best Original Song nominee “The Place Where Lost Things Go” from — you guessed it – “Mary Poppins Returns.”

Mike Myers and Dana Carvey reunited as Wayne and Garth to present Best Picture nominee “Bohemian Rhapsody,” the same week the "SNL" sketch "Wayne's World" turned 30. The song is part of a famous scene from the 1992 "Wayne's World" movie.

Spike Lee took home Best Adapted Screenplay for “BlaKkKlansman,” and used his speech as a platform, calling attention to 2019 being the 400-year anniversary of slavery in Virginia, “Four hundred years," he said, "our ancestor was stolen from Northern Africa and brought to Jamestown, Virginia. Enslaved." He ended with another political message, noting the 2020 election is around the corner. “Let us all mobilize. Let us all be on the right side of history. Make the moral choice between love versus hate."

Lady Gaga and Bradley Cooper gave “A Star Is Born” fans a glimpse of their characters Ally and Jackson with an intimate performance of “Shallow.” They gazed into each other's eyes and even sang into one mic together, just like in the movie!

Gaga went on to win Best Original Song for “Shallow,” and she was in tears. She told Cooper, “Bradley, there is not a single person on the planet that could've sang this song with me but you.” She also had a message for viewers at home, saying, “It's not about winning. But what it's about is not giving up. If you have a dream, fight for it.”

Rami Malek took home Best Actor for his portrayal of Freddie Mercury in “Bohemian Rhapsody.” He joked his “little Bubba Rami” self would have had his mind blown by the win. He paid tribute to Mercury, "a gay man, an immigrant, who lived his life unapologetically himself," adding, “We're longing for stories like this. I am the son of immigrants from Egypt, I am a first-generation American. Part of my story is being written right now."

He also called out girlfriend and co-star Lucy Boynton in his speech, saying, “Lucy Boynton, you are the heart of this film. You are beyond immensely talented. You have captured my heart.”

Olivia Colman gave a teary and emotional speech as she accepted the award for playing Queen Anne in "The Favourite," besting Glenn Close in the category, who had been expected to win for "The Wife" on her seventh try. Colman told the crowd, "It's genuinely quite stressful. This is hilarious. I got an Oscar." She went on to say, "I have to thank lots of people. Yorgos [Lanthimos], my best director and the best film with Emma [Stone] and Rachel [Weisz], the two loveliest women to fall in love with and go to work with every day. You can imagine it wasn't a hardship.”

The night ended with Alfonso Cuarón winning Best Director for “Roma” and “Green Book” taking home Best Picture!