“Wish I could tell you that I love you, but I can’t,” bülow sings on 2017’s “Not a Love Song,” the Top 40 Canadian hit that introduced her uncanny ability to embed harsh sentiments in ecstatic future-pop. Ever since, the Berlin-born, Ontario-bred singer has messed with our emotions as gleefully as she blurs genre boundaries, whether taking us inside a dysfunctional relationship on the string-sweetened folk ballad “Two Punks in Love,” or ridding herself of a frenemy on the ‘90s-alt-rock/R&B hybrid “First Place.” Her open-minded approach has also yielded a he-said/she-said duet with Ty Dolla $ign on The Chainsmokers’ synth-funk reverie “Do You Mean.”