Jennifer Lopez is learning kids grow up so fast ... her child Emme Muñiz just graduated high school ... and we've got pics from the ceremony. Emme walked across the stage in a cap, gown and lei ... accepting her diploma as J Lo stood nearby rocking glamorous sunglasses and an elegant outfit ... and beaming with pride. 18-year-old Emme has a twin, Max Muñiz , but he went to a different school ... so this celebration was all about Emme ... and Max was there supporting his sibling. Emme chatted