Mia figured that a some people might be pissed that they might be potentially getting ditched... Was she getting ditched? She didn't really have a frame of reference for this sort of thing.
But hey, Bart was full of surprises.
When the song ended and the crowd began to dissipate. Mia stayed watching them. But she was behind Kara so she gave Bart a bit smile, nodded her head, and gave him thumbs up.