Maroon 5: Red Pill Blues review – impeccable pop and middling R&B

(Polydor)Quite how Maroon 5 have become one of the world’s biggest groups might seem a mystery worthy of Sir Arthur Conan Doyle. But, as Sherlock Holmes was wont to say: once you have removed the impossible, what remains – however unlikely – must be the truth. And what remains are a handful of impeccably structured pop songs – the likes of This Love and Moves Like Jagger – that are enough to generate Maroon 5’s huge popularity. On their sixth album, that conti