Get your news from a source that’s not owned and controlled by oligarchs. Sign up for the free _Mother Jones Daily_. On the irresistible Polaris, the Allstars diversify the driving, bluesy

attack of their previous two albums. Fronted by Luther Dickinson, this freewheeling quartet brings the spontaneity of a jam session to its soulful tunes, with feel-good results. Dickinson is

a deft yet unpretentious guitarist who evokes the sweet slide licks of Duane Allman on “Eyes” and channels Jerry Garcia’s spacey elegance in the country-blues delight “The One Thing.” The

Allstars ignore boundaries, blithely shifting styles; the hybrid of psychedelia and hip hop on “Be So Glad” could easily seem contrived, but Dickinson and company make sure every note sounds