Chart-topper Jennifer Lopez  has only been living in  her newly renovated $18 million mansion  for a matter of weeks—but she’s already preparing for both of her children to move out of the dwelling in order to head to college , a milestone that the singer admits reduces her to tears whenever she thinks about it. Lopez, 56, moved into her opulent  Hidden Hills, CA , dwelling in time to spend  Memorial Day weekend  at the property with her 18-year-old children,  Emme and Max , whom she shares