“Free Jazz,” the new single by the Swedish band Envelopes, is by far the catchiest indie pop track in years. Audrey Pic’s unmistakable accent (kind of like hearing a baby speak for the first time) adds to the song’s brilliance. Check out the surreal video, in which a Vespa barrels through an apartment and the drummer has to fish his skins out of a pond. Meanwhile, I’ll be singing “Ashpehlashpelshpel-huh” for the next few days, so if anyone wants to clue me in on a translation, I’d appreciate it.