Their new single, Boyfriend, takes songs like Katy Perry's I Kissed A Girl or Demi Lovato's Cool For The Summer and tells the other side of sapphic experimentation.
In a recent Pitchfork interview, Sara explained that the track was written about the beginning of her current relationship. Her girlfriend had never dated a woman before, and was still involved with another guy.
"You turn me on, like you would your boyfriend," she sings. "But I don't wanna be your secret any more."
The video shows the sisters being forced into a series of music video clichés - confetti cannons, silhouetted dancers, green screen videos of zebras (?) - but eventually being allowed to be themselves. It's a metaphor for freedom of sexual expression, innit?