Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Look at us, smiling in the photograph♪ You can see the secrets behind the fake smiles♪ (*・ω・*) (©FACT「a fact of life」)
This tweet contains emotions: 
joy