It reminds me of the meme where guys sing over "Evanescence - Bring Me To Life" with the snapchat gender swap filter on. The female vocals are done facing the camera, showing a female face, the male vocals are done sideways. Turning sideways effectively disables the filter, showing the real (male) face.

Just look it up, (or go there if you feel lazy https://digg.com/2019/bring-me-to-life-gender-swap )