On his seventh album, Usher Raymond IV claims to have invented a new genre, which he has modestly termed "revolutionary pop". The claim is, of course, spurious – all he's done is admitted various dance music elements into his ultra-smooth R&B sound. Still, it's nice to hear a pop juggernaut such as Usher (five multi-platinum albums over 14 years) taking a few risks: for one, they yielded Climax, his sublime collaboration with Diplo. However, for every hit – Lemme See is another – there are a couple of misses: Can't Stop Won't Stop, the Euro-dance opener produced by will.i.am, is horribly overblown.