It’s almost as if all those nine-minute-plus compositions, sung in a nonsense tongue and eventually swelling to musical and emotional heights that practically exploded with a mix of tension and joy, have been compressed into the perfect four-minute pop song. It’s still Jonsi Birgisson, it’s still a vast palette of sounds, and it’s still that same Sigur Ros message of love and inner peace . . . except with none of the restraint that other members of Iceland’s most famous band had on Birgisson in the past. Go is undoubtedly Jonsi, a being of such unrelenting optimism and jubilant celebration that he apparently has rainbows shooting out of the back of his head. It’s not really surprising, considering the increasingly poppy direction Sigur Ros was heading in, but here the best attributes of Sigur Ros and Jonsi’s effervescent personality have been magnified through a multichromatic array of sounds and feelings. That post-rock standard of tension and release has been transformed, filtered through the (relatively) strict dimensions of a pop song and made into something that just wants you to stand up and be filled with joy at everything around you.