Lorde kicked off her North American tour supporting her Melodrama album (one of SPIN’s top five albums of 2017) last night in Milwaukee. Among the surprises in the set was a performance of an unreleased song, which features a lightly Caribbean beat and inflection. There’s some discussion of “precious metals” (the song’s probable title), “witchcraft” and–in a rap-like section–a trip to Jakarta. As Billboard notes, Lorde posted about a scrapped show she had revived for the tour in an Instagram story last month: “I may or may not have dug up a song that we wrote during the Melodrama sessions that didn’t make it. One that I really love.” She also covered Frank Ocean‘s Blonde track “Solo,” kneeling on stage in an apparent homage to one of Ocean’s preferred performance modes. Watch videos of both performances below.