By now it goes without saying Ariana Grande is the biggest pop star of our generation. It's through her imperfections that she's become the perfect icon for fans all over the world. Well the 'Break Up With Your Girlfriend, I'm Bored' singer forgot a pretty integral piece of the her stage performance the other night during her Sweetener World Tour when she didn't have her microphone for one of her biggest hits. She looks to her background vocalists during the beginning of 'Thank U, Next' but didn't make a big deal of it so all was good in the world. Grande brings her tour to Chicago June 4th and 5th at the United Center.