Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Keep #smiling because life is a beautiful thing and there's so much to #smile about. #MarilynMonroe #KeepSmiling
This tweet contains emotions: 
joy, love, optimism