The 17-year-old Happyland actress was joined on the orange carpet by Awkward actress Greer Grammer.
During the show, Katherine took to Twitter to tell her fans how amazing the awards were.
“Having such a great time at the @NickelodeonTV #KCA2014. So fun watching the antics on stage, especially the slime! #KCA,” she tweeted.
FYI: Katherine wore a Clover Canyon dress, Charlotte Russe shoes and a Kendra Scott necklace. Greer wore an Armani dress and shoes and Atelier Swarovski jewelry.
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