Sales projections suggest that Rainbow, Kesha's third album, will romp to an easy victory atop the charts in both Canada and the USA when their charts are published in a couple of days, and although it hasn't managed to do that anywhere else, it does make a fine start.

Paced by the success of first single Praying, which is scaling the charts globally, Rainbows is Kesha's first album after an enforced hiatus of nearly five years while she sorted out ...