MTV handed out its golden popcorn trophies Sunday for the 22nd MTV Movie Awards. This year's awards - hosted by Conan O'Brien - featured male objectification, meme-inspiring animals and a special tribute to a fallen actor. Here are 6 key moments from the show.

Hello, Zac Efron

Zac Efron won best shirtless performance for his work in "That Awkward Moment." Fittingly, he accepted the award shirtless - after Rita Ora ripped it off of him, fulfilling a Twitter promise he had made in March.

"I really don't know what to say, but thank you so much to my fans," he said.

Celebs Galore

How many celebs can you cram into a Movie Awards opening clip?

The show began with O'Brien and a group of suits trying to figure out how many celebrity cameos they could fit into the segment. O'Brien promised 50 celebs.

"This is insanity," one of the men said. "I've been with MTV since 1947 ( note: MTV launched in 1980), and you sir will never get 50 cameos."

So Conan embarked on his quest, tracking down celebs - in the bathroom, in bed, at a modeling shoot, poolside … He even got his nails done with singer Taylor Swift, trying to extend their moment into something special.

"Thanks a lot for meeting me here," he said.

"It's fine … This is just like a quick cameo thing?" she asked.

"Yeah … I mean, it can be as long as you want it to be. I don't know how much time you have. You want to hang for the day … maybe go get some food, catch a movie, take a walk on the beach?"

Swift stared at him, her nails soaking, not quite sure what to say.

Mila's Baby Bump

Mila Kunis, who's pregnant, showed off her baby bump while accepting the award for Best Villain in "Oz: The Great and Powerful."

"You just made my 12-year-old self's dream come true," she told the crowd. "This is by far the coolest award and I just realized I was the only woman nominated, and I won. So thank you guys."

Seth Rogan Kisses … His Mom?!

Seth Rogan, Efron and Dave Franco - the stars of "The Neighbors" - presented the award for best kiss. So they decided to invite three female fans to the stage to kiss them, courtesy of golden tickets placed under the seats. Rogan's ticket-holder? His mother.

They went through with it. It was weird.

"Oh my god man, that was awesome," Efron said. "That was hard to watch, but that was awesome."

Remembering Paul Walker

Walker, the star of the "Fast & Furious" franchise, was honored by his co-stars. Jordana Brewster spoke about Walker's humbleness.

"For Paul, every day was an adventure to be tackled, and he wanted to make a difference in this world," she said.

Vin Diesel appeared in a video tribute, saying, "The world saw his magic onscreen, the world saw his philanthropic endeavors, and yet I wish the world could have seen how special a brother he was."

Conan Disses Nick Lachey (Sorta)

During his opening, O'Brien mentioned Grumpy Cat, the internet celeb known for her sourpuss face. The cat wore a replica of Pharrell's oversized hat to the show, and she sat in the front row.

"I've been in show business for over 20 years, this is the first time I've ever had to perform for a cat - Grumpy Cat is in the first row, asleep! A human being is performing for a sleeping pet! This is the end of civilization as we know it. And why does Grumpy Cat have a better seat than Nick Lachey?"

Lachey threw up his hands, smiling about the slight.