Panel 2: However, it looks like she's really into it. And not the farcical kind of face-screwed-up, giving-110%-so-everyone's-too-embarrasse
Panel 3: And is that some breast side-swell I see?
Panel 4: Yeah, that's Duncan.
Well, I dunno where this is going. I can't read those expressions. It does seem like this song was written specifically for grad*, so Becky can't be accused of stealing it. She doesn't seem to have made a fool of herself, so she won't be humbled. Maybe this is the moment when she proves that there's more to her than being roadside? What say you?
*and I hope that's the last time I ever have to use that word.