Question: who sings the mcdonald's jingle i'm lovin it
[{'answer': 'Justin Timberlake', 'provenance': [{'wikipedia_id': '3283883', 'title': "I'm Lovin' It (song)", 'start_paragraph_id': 1, 'start_character': 65, 'end_paragraph_id': 1, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3283883', 'title': "I'm Lovin' It (song)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 225, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13669915308033442583}, 'section': 'Section::::Abstract.'}]}]