Kids' Choice Awards Owned By Justin Bieber, Taylor Swift

Performances from Katy Perry and One Direction also stood out at Nickelodeon awards show.

Host Will Smith was joined Saturday (March 31) by a bevy of stars for Nickelodeon's annual slime-fest, the Kids' Choice Awards.

The movie star and MC kicked off the night with a KCA-themed rap that included the first sliming of the night, when buckets of the famed goo fell on the audience, setting the tone for the fun-filled evening. The "Men In Black III" star promised that 2012 would include a record-breaking amount of slime, adding, "No one is safe from the slime." That included Halle Berry, who was the first celeb to get slimed.

The night's first presenters certainly brought the kooky factor up a bit. Nicki Minaj was decked out in a candy-colored dress complete with a bustier made out of tickets and bubbles glued to her skirt, as she stood alongside "Hunger Games" star Josh Hutcherson. The pair handed out the first blimp to Favorite Musical Group winners Big Time Rush.

Real-life couple and "The Amazing Spider-Man" stars Andrew Garfield and Emma Stone presented the award for Favorite Movie Actor. But before handing the blimp to Adam Sandler, Garfield told the room, "I feel like the luckiest guy in the world, 'cause I got to play my favorite superhero."

Justin Bieber Gets Slimed! Click to see the photos!

KCA first-timer and "Glee" star Chris Colfer got slimed when he hit the stage to present Selena Gomez the award for Favorite TV Actress. Perhaps Heidi Klum should have shared this advice with him first: Never trust anyone at the KCAs. Decked out in a two-piece, midriff-baring top and sparkly skirt, Gomez also won for Favorite Female Singer. "After no longer doing my show, knowing you guys still watch it means so much," she said of her now-defunct Disney series "The Wizards of Waverly Place."

Katy Perry was the first performer of the night. Done up in medieval gear, she flew across the room to the stage, where she broke out into her latest hit single, "Part of Me." Behind her, dancers were decked out in costumes from the same period. She served as a court performer, singing her scathing breakup track for the king and queen. The performance ended with Katy hitting the king with a pie.

Perry also won a blimp for her work in "The Smurfs," declaring, "The only reason I'm here today is because I've never gown up. I can't wait to do 'Smurfs 2.' "

Kristen Stewart won for Favorite Movie Actress for "The Twilight Saga: Breaking Dawn - Part 1." Beaming in blue lace, she said, "This is, like, the coolest awards show ever. I love Nickelodeon. I liked 'Doug,' 'Rocco's Modern Life.' Awesome. I just have to say: Katy Perry's armor was the coolest thing I've ever seen."

Next up, the show got a bit serious when first lady Michelle Obama presented Taylor Swift with the Big Help Award. Swift won the special blimp in recognition of her philanthropic efforts, including work with U.S. tornado and flood survivors and various youth-related charities.

"I'm so honored. I have always wanted to meet you; this is amazing. I am so honored to be receiving this award from the first lady of the United States. I am freaking out," Swift said. "I'm really proud of all of you guys. I see you helping each other out. I think it's important you know you are making a difference in this world."

Taylor Lautner has kicked enough butt and taken enough names on the big screen that he won the blimp for Favorite Butt Kicker. "This is amazing," he told the room of screaming fans. "Robert, I'm sure you'll be winning this award next year for 'Iron Man 3' and 'The Avengers.' " That Robert he was referring to was presenter Robert Downey Jr., not Pattinson, obviously.

After winning, he was forced to do 1,000 push-ups by Smith. His reward for completing the misson? Getting slimed.

One Direction continued their U.S. takeover with their performance on the show. For "What Makes You Beautiful," the guys wore all black-and-white while futuristic lights danced behind them. Proving that everyone is a One Directioner at this point, Katy Perry, Taylor Swift and Selena Gomez danced around in the audience and sang every word of the song, while the fivesome kept girls screaming with their frothy, lighthearted pop track.

The big twist of the night came when Cee Lo Green was revealed as Will Smith's nemesis, the man dubbed "Creepy Voice." "Creepy Voice" had spent the night taunting Will, telling him how inadequate a host he is. His reasons? "I've always wanted to be slimed," "The Voice" judge said. "My name is Cee Lo Green. Slime's green. Slime me!" He didn't get slimed, but he did get ice-cream-sundaed. Maybe next year, Cee Lo.

After kicking Jaden and Willow out and accusing them of being "Creepy Voice," he brought his performer kids back out to hand out Favorite Male Singer, the night's last award. Justin Bieber, fresh from shooting his "Boyfriend" video, took the stage to accept his blimp.

"Right now, I've been working really hard on my album, Believe. This album is our album. This [blimp] goes out to all the fans. I love you so much," he said. In addition to the blimp, with Will by his side, Bieber got über-slimed, with the ooey-gooey stuff spewing out from the stage all over him.

And, with that, the show ended.

What did you think of the Kids' Choice Awards? Let us know in the comments!