User blog:ElliottB1/Quick answer.

This comment is on AAD's video of the World Dance Floor.

"I have no idea how I caught this, but at 0:12, look at the right of screen. More specifically, those faces are actually past Just Dance dancers. The top one is the one from She's Got Me Dancing (JD3), and I think the middle one is Love You Like a Love Song (JD4). I have no idea what the bottom one is, though.﻿"

The bottom face is I Don't Feel Like Dancin' (JD3).