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: Melissa Benoist and Grant Gustin HAVE to do a musical crossover episode! #glee origins #arrowverse
This tweet contains emotions: 
anticipation, joy, optimism