Know-It-All

Alessia Cara’s defiantly grumpy breakthrough hit, “Here,” was about feeling like an “antisocial pessimist” who opts out of alcohol- and weed-tinged parties. On another single from her debut LP, “Wild Things,” the 19-year-old Canadian singer-songwriter declares that she won’t “hang around the in-crowd/The cool kids aren’t cool to me.” Okay,…