Obama hinted at his past while weighing in on the success of BuzzFeed.
"I remember when BuzzFeed was just something I did in college around 2 a.m.," Obama said. "It's true."
Watch a video of Obama's joke above, and check out a slideshow of photos from the event below:
UPDATE -- 11:31 p.m.: Jonah Peretti, the CEO of BuzzFeed who was a co-founder of HuffPost, cleared up any confusion for Obama in a tweet Saturday night: