Lucifer is doing a full-blown musical episode

Entertainment Weekly

EW reports that the ninth episode of Season 5 will be a musical episode. "Titled 'Bloody Celestial Karaoke Jam,' (wonder who speaks that line of dialogue…) the hour will feature multiple musical numbers and shouldn’t be confused with the final season’s fourth episode, which is 1940s noir themed and contains two song performances," reports EW's Chancellor Agard. "Music has always been a big part of the WBTV drama’s DNA going as far back season 1. In fact, showrunners Ildy Modrovich and Joe Henderson have always wanted to do a musical episode but were waiting until they came up with the right story." Modrovich says planning the episode has been like playing Tetris, adding that "it's going to be just such a bucket list thing for me."