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No, really!

After attending the Teen Choice Awards at the Gibson Amphitheater in Los Angeles last night, Kendall and Kylie Jenner attended the Party for a Cause event at the Globe Theater in Universal City.

Staples and DoSomething.org teamed up with the sisters (along with a handful of other young stars) to hold the annual Staples for Students celebrity school supply drive, and they celebrated the season-long campaign which provides a chance for teens across the country to give back to their communities.

Since 2008, the campaign has raised more than $2 million for hundreds of thousands of students in need, and past celebrity supporters have included Jordin Sparks, Ciara, Nikki Reed and the cast of Pretty Little Liars.

Click the gallery below to see more celebs at the event, including Jojo and Bella Thorne!