Stewart, 22, escaped the slime but plunged her hands into the green goo saying she felt like she finally "realized my kindergartner self," as she accepted trophies for movie actress and favorite female butt kicker. She also embraced the recently-slimed presenters Sandra Bullock and Neil Patrick Harris.
Organizers said more than 350 million votes were cast online in more than 20 categories spanning film, television, books, music and sport for the stunt-filled annual award show on youth channel Nickelodeon.
Johnny Depp and Katy Perry accepted orange blimp-shaped trophies for favorite female singer and movie actor respectively and both stars had words of wisdom and praise for the audience of kids and young teens.
Selena Gomez, 20, the ex-girlfriend of pop star Justin Bieber, took the female TV actress award for her Disney Channel series "Wizards of Waverly Place," even though the show came to an end more than a year ago.
Bieber, who is on tour in Europe, was voted favorite male singer and was among several stars that did not make it to accept their award in person.