Michelle Obama danced in front of 8,000 screaming teens for College Signing Day in Philadelphia. The former first lady showed off her moves Wednesday at Temple University during the yearly event that celebrates high school kids who are heading off to school, with many wearing T-shirts from their respective colleges, Philly.com reports. She wore a blue denim peplum jacket by Alexander McQueen with black skinny jeans, a black tee, and strappy black shoes. Footage of the 54-year-old’s performance was shot by actress Zendaya, who cheered in the crowd.Oh my goodness, what a crowd,” said Obama as she came onstage. “I’m...