Actually, it was a blues song Yelena was whistling. Maddy might have recognized it if she was acquainted with Elmore James. Unfortunately her foolish attempt to steal Yelena's fresh title is for naught, as she rather fiercely kicks out, then kicks Maddy in the face for good measure to make sure she isn't bothered when returning to her table.

On the way out, Yelena continues the tune she was whistling, but now quietly singing the lyrics.