As the end of the Oscars drew close, the anti-bullying activist popped up at Vanity Fair's annual bash in L.A. Sunday.
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The appearance comes nearly three weeks after Lewinsky joined forces with Vodafone to create and debut the new #BeStrong Emoji Keyboard app, which help teenagers "communicate support in a bullying situation."
"Had social media been around in 1998, the thought of the hashtags alone makes me want to run to a therapy session," she told PEOPLE exclusively. "But what would have been positive was that not only would I have been able to see when someone made a supportive comment, but others would have, too. Compassion can be contagious."
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She added: "That is what is at the heart of the #BeStrong emojis: for people – especially teens – to feel less alone when these incidents happen online."
The 88th annual Oscars, hosted by Chris Rock, are being presented live on ABC from the Dolby Theatre in Hollywood, California.