2014 Kids' Choice Awards: Check Out The Best Fashion Moments

At Nickelodeon's show, Pharrell rocked a SpongeBob onesie, Austin Mahone wore a slime-green suit and more celebs cleaned up for the annual orange carpet.

Celebrities of all ages gathered at the Nickelodeon Kids' Choice Awards to walk the orange carpet, present awards and a lucky few even got coated in the famous green slime (no, Mark Wahlberg, you are not "unslimeable.") While stars like Bella Thorne and Victoria Justice cleaned up to pose for pics, a few others embraced their inner kid and had fun with their outfits.

Todrick Hall Swings In Like A Wrecking Ball

The American Idol alum kicked off the show, going through a series of outfit changes and reeling off versions of "Timber," "Applause," and more hits before paying homage to Miley Cyrus' "Wrecking Ball." Todrick donned a version of the singer's famous VMA performance outfit while actually swinging on a wrecking ball.

Pharrell Wears A SpongeBob Onesie

Pharrell stepped up to the stage rocking a bright yellow SpongeBob SquarePants onesie, which would later become coated with the green stuff.

Selena Gomez And Lea Michele Are Backstage BFFs

Selena Gomez and Lea Michele got cozy backstage (presumably keeping their pretty dresses away from any spot of slime).

See More Kids' Choice Awards Orange Carpet Photos

Ariana Grande Stays On Theme In Orange

Ariana Grande rocked a new straight 'do and was perfectly on trend with Nickelodeon's colors, accepting her orange blimp award for Favorite TV Actress while wearing a tight orange mini dress.

Austin Mahone And Cody Simpson Wear Green Slime Suits

The two studly singers looked sleek on the orange carpet, but they would later get coated in the green gooey goodness. At Kids' Choice, no one is safe from the slime.