Delightful animated musical 'Sing' hits all the right notes

If (like me) you have a parental obsession with brainwashing your children to adore everything from Sinatra to "Shake It Off," "Sing" may be your most effective weapon since "Happy Feet." This animated feature carries a thin story that can't touch the one in "Happy Feet," though: A koala who is also a theater impresario (Matthew...