Oprah Winfrey is urging 2018 graduates to "be the truth" and "exemplify honesty."

The media mogul passed on these words of wisdom and more during an impassioned commencement speech for the University of Southern California's Annenberg School for Communication and Journalism on Friday, which took aim at fake news.

"Everything around us, including and in particular the Internet and social media, is now being used to erode trust in our institutions, enter fear in our elections and wreak havoc on our infrastructure," she said. "It enables misinformation to run rampant, attention spans to run short and false stories from phony sites to run circles around major news outlets."

The good news, Winfrey said, is that upcoming leaders, like the graduates in the audience, have the power to change things.

"You will become the new editorial gate-keepers, an ambitious army of truth-seekers who will arm yourselves with the intelligence, with the insights and the facts necessary to strike down deceit," she said. "You can answer false narratives with real information and you can set the record straight."