Question: The TV campaign for the brand No7 uses a tune by a singer born in what city?
Sentence (from "No. 7 (brand)"): No7 is a brand of anti-ageing creams, skincare and cosmetic products developed by Boots UK, so called because the number seven was, at the time, frequently used to denote perfection and Boots wanted it to stand out from the rest of the own-brand merchandise it produced.
Relevant evidence: No