Swedish wunderkind Zara Larsson continues to live her lushest “Lush Life” — which, let us recall, was in the running for song of the summer last summer — with last night’s performance on The Tonight Show Starring Jimmy Fallon. Before the show aired, Larsson also shared a new single, “Ain’t My Fault,” which was co-written with MNEK.
The Fallon performance echoes…