Question: who sang it must have been love but its over now
[{'answer': 'Roxette', 'provenance': [{'wikipedia_id': '42624', 'title': 'Roxette', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42624', 'title': 'Roxette', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 632, 'bleu_score': 0.8246875590796391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11673166484361961220}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '575457', 'title': 'It Must Have Been Love', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"It Must Have Been Love" is a song written by Per Gessle and performed by the Swedish pop duo Roxette. The power ballad became the duo\'s third number one hit in the United States, and is one of their best selling releases, being certified gold or platinum in a number of countries. Four different versions of the song have been officially released. The original song was released in 1987, which was followed by the most successful incarnation, a slightly edited version omitting the Christmas references created for the', 'It Must Have Been Love" is a song written by Per Gessle and performed by the Swedish pop duo Roxette']}}]}]