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 just spent $40 on big little sis tomorrow and i am beyond happy about it #SAW #mirth #mums
This tweet contains emotions: 
joy