Rachael Yamagata covered the Muppets! And she turned the Muppet song into the Beach Boys in the bargain! It’s all true. Check out “I’m Going to Go Back There Someday,” with its strings, its dum-diddey-dums, almost-whispered vocals. Her latest album, 2016’s Tightrope Walker, dials up the strings a few notches, and dallies with just slightly more direct singing. I can’t say how all this delicacy translates to the live setting, with overdubs out of the question and sound levels tilting toward brute-force-or-drowned-out. But it should be enthralling to hear for oneself. by Andrew Hamlin