Task: Evaluate the tweet for emotional cues and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that indicate the tweeter's state of mind.
Tweet: The difference between someone's selfies when they're happy vs. unhappy is absolutely amazing.
This tweet contains emotions: 
joy, optimism, surprise