Question: who sings the theme song to liv and maddie
[{'answer': 'Dove Cameron', 'provenance': [{'wikipedia_id': '38874307', 'title': 'Liv and Maddie', 'start_paragraph_id': 1, 'start_character': 234, 'end_paragraph_id': 1, 'end_character': 246, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38874307', 'title': 'Liv and Maddie', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 458, 'bleu_score': 0.8794007348239671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15203897131424519544}, 'section': 'Section::::Production.:Music.\n'}]}]