From Longman Dictionary of Contemporary Englishpop groupˈpop group noun [countable] especially British English APMa group of people who sing and perform pop music
Examples from the Corpus
pop group• Gedge can not remember a time when he did not want to be in a pop group.• A pop group is not a group of social workers.• At last year's final, another pop group, Dollar, also mimed to a recording for its guest spot.• Additionally, there was an evening barbecue entertained by a local pop group.• It will probably take six or seven minutes in all, and will be a perfect pop group performance.• Not your typical pop group, in other words. 