At first listen, Sizzy Rocket’s new single, “Bestie,” bears some resemblance to Katy Perry’s “I Kissed a Girl,” in that they are both unfairly catchy pop songs about giving in to bi-curious yearnings. But Rocket’s anthem veers (at about the 50-second mark) away from coyly courting the male gaze and toward embracing a gloriously sapphic one. “Bestie” is the soundtrack for the free-spirited, sexually fluid, hedonistic woman who rejects society’s labels and loves to dance (and eat juicy watermelons). For all that — plus unitards and lots of lunging — hit play above.