Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: That was absolutely the two worst National Anthem singers I've ever heard, both of them screwed up the words #awful
This tweet contains emotions: 
anger, disgust, pessimism, sadness