Question: who did the singing in the movie rock star
[{'answer': 'Miljenko Matijevic', 'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 5, 'start_character': 562, 'end_paragraph_id': 5, 'end_character': 580, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'answer': 'Brian Vander Ark', 'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 12, 'start_character': 161, 'end_paragraph_id': 12, 'end_character': 177, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'answer': 'Jeff Scott Soto', 'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 12, 'start_character': 179, 'end_paragraph_id': 12, 'end_character': 194, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'answer': 'Kennedy', 'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 7, 'start_character': 692, 'end_paragraph_id': 7, 'end_character': 699, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 476, 'bleu_score': 0.953902344573157, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12974290644693182459}, 'section': 'Section::::Cast.\n'}]}]