Question: who sings let's marvin gaye and get it on
[{'answer': 'American singer Charlie Puth', 'provenance': [{'wikipedia_id': '46433088', 'title': 'Marvin Gaye (song)', 'start_paragraph_id': 1, 'start_character': 46, 'end_paragraph_id': 1, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'guest vocals by Meghan Trainor'}]