Question: who sang the song don t worry be happy
[{'answer': 'Bobby McFerrin', 'provenance': [{'wikipedia_id': '1390782', 'title': "Don't Worry, Be Happy", 'start_paragraph_id': 1, 'start_character': 77, 'end_paragraph_id': 1, 'end_character': 91, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]