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: I don't know why everyone is pretending to be sad about angelina and brad, everyone knows his dumb ass should've stayed with jennifer.
This tweet contains emotions: 
anger, disgust, sadness