When Vine was still popular in 2013, Shawn Mendes only needed six seconds of camera time to become an overnight internet sensation. Mendes, a 19-year-old singer-songwriter, shared a video of him singing...

One switch of his camera to selfie mode, and Pitt student Nathan Enick becomes someone else. He’s Sherri, the neighbor who loves to brag about her exceptional baking skills while casually showing off...