Anne Hathaway has announced that she’s expecting her third child with an adorable video shared on Instagram. On June 19, Hathaway revealed that she and her husband, Adam Shulman, are expecting with a clip in which she walks into frame with her arms folded across her midsection, then drops them to reveal her bump. The actress then flashes a wide smile, hugs her stomach, and runs playfully out of frame. The clip was captioned "x Baby, I'm yours x" and set to Barbara Lewis's 1965 classic "Baby, I'm Yours." Hathaway told People earlier this year why she announces her pregnancies online, saying the decision was spurred on by a situation where a paparazzi caught her at an inopportune moment. "Basically, I saw someone was taking photos of me, and I think at that point, people kind of knew I was pregnant," she said.…