Fresh off “Tonight,” the first single from her upcoming mixtape, Fancy That, out May 9, PinkPantheress keeps her infectious bubblegum energy going on a new track, “Stateside.” With a playful nod to Estelle’s “American Boy,” the British singer teases, “maybe you can be my American hot, hot, hot boy,” but with lots of heavy breathing.

Set against a pulsing bass line, the artist reflects on the whirlwind of an international romance that feels almost too good to be true: “You’re nice, so I’ll stay/Never met a British girl,...