Question: who sings i want to be a rockstar
[{'answer': 'Canadian rock band Nickelback', 'provenance': [{'wikipedia_id': '7080819', 'title': 'Rockstar (Nickelback song)', 'start_paragraph_id': 1, 'start_character': 43, 'end_paragraph_id': 1, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Nickelback', 'provenance': [{'wikipedia_id': '7080819', 'title': 'Rockstar (Nickelback song)', 'start_paragraph_id': 0, 'start_character': 10, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Billy Gibbons of ZZ Top', 'provenance': [{'wikipedia_id': '7080819', 'title': 'Rockstar (Nickelback song)', 'start_paragraph_id': 1, 'start_character': 404, 'end_paragraph_id': 1, 'end_character': 427, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7080819', 'title': 'Rockstar (Nickelback song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 427, 'bleu_score': 0.9348189981364851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10862354375309744905}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7080819', 'title': 'Rockstar (Nickelback song)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"Rockstar" is the fifth U.S. single by the Canadian rock band Nickelback from their fifth album, "All the Right Reasons" (2005). It was initially only released in the United States and Canada, and has since been re-released worldwide. The lyrics feature the pretentious, materialistic desires of a wannabe rockstar, who craves money, cars and women. Spoken-word vocals between each verse are provided by Billy Gibbons of ZZ Top.', 'Rockstar" is the fifth U.S. single by the Canadian rock band Nickelback from their fifth album, "All the Right Reasons" (2005', '"Rockstar" is the fifth U.S. single by the Canadian rock band Nickelback from their fifth album, "All the Right Reasons" (2005). It was initially only released in the United States and Canada, and has since been re-released worldwide']}}]}]