A post shared by Mark Zuckerberg (@zuck) on Jun 22, 2017 at 4:58pm PDT Subscribe | UPI Odd Newsletter Subscribe June 23 (UPI) -- Facebook founder Mark Zuckerberg shared a photo this week that shows his face painted on someone's fingernails. Zuckerberg posted the photo on Thursday to his Instagram account, calling it "a first." Advertisement The photo -- which features fingernails painted with Zuckerberg's face, the Facebook "love" symbol and a twist on the classic "like" button -- appears to be from Facebook's Communities Summit this week in Chicago. CNN reported that about 300 Facebook group administrators attended the event this week. Read More Facebook to hire 3,000 people to monitor live videos for violence Facebook taps New York Times veteran to fight fake news Facebook's Zuckerberg surprises Ohio family for dinner