Celebrity endorsement is the most irritating form of brand-boosting marketers have yet conceived – and that’s saying something. George Clooney flirting over a Nespresso coffee machine; Andy Murray fumbling for his Rado watch in what should have been his moment of US Open glory; Brad Pitt intoning “Chanel No 5: inevitable” in the new “groundbreaking” scent campaign: the product of such tie-ups is almost always cloying or annoying or both. Read more