Glamour, high fashion, and red-carpet intrigue are par for the course when it comes to the annual Primetime Emmy Awards, but no one was arguably more buzzworthy than Selena Gomez at last night’s 76th iteration of the ceremony. As star of the TV show Only Murders in the Building—which raked in 21 nominations this year—of course the woman had to come dressed to the nines. She did so in a custom...