Concert review

The most infamous stage prop of the year finally arrived in Seattle.

There they were, gleaming and spinning in the middle of a full-house Climate Pledge Arena on Monday. Cheeky pop-country queen Kacey Musgraves buckled herself into the giant disco-ball replica of an off-color, anatomical truck accessory. In absurdist glory, the sparkling “truck nuts” carried Musgraves into the air above her massive stage for the stoner disco-country stepper “Rhinestoned” — a slow-grooving cut from her new album, “Middle of Nowhere,” that features some of its savviest, understated songwriting.

“Seattle, are they big enough for ya?” Musgraves asked, as she and her utterly ridiculous set piece twirled in the air.

The veteran country star is no stranger to toeing lines and pushing envelopes in Nashville.…