Once again, Ariana Grande has broken down into tears while performing. The last time was when she was performing in Mac Miller's hometown of Pittsburgh. Now, she was performing in St. Louis and struggled to get through her song "R.E.M.". She later addressed the breakdown on twitter (it is now deleted). She wrote "I feel everything very intensely and have committed to doing this tour during a time in my life when i'm still processing a lot...so sometimes I cry a lot! I thank you for accepting my humanness. I'm not sure what I did to deserve to meet so many loving souls every night / to feel so much love, but I want you to know that it really does carry me through. I feel it and appreciate it. and all of you so much."