The most eagerly-embraced new album released today is Rainbow, the third long-player by Kesha, which arrives five years after her second and is currently No.1 on iTunes in 19 countries. It follows her lengthy legal dispute with former mentor Dr. Luke, and leads the way in her native USA, Canada, Brazil, Finland and Russia, among others.

Featuring collaborations with Eagles Of Death Metal and Dolly Parton, it may struggle to maintain impetus for the whole week but still marks a ...