I understand your confusion and-slash-or disgruntlement. But, we have to consider that [as we saw in 'Suited for Success,' so it's not a spoiler] her hair has been styled and neatened up for the Gala, there's probably been some make-up work (for the same), and, judging partially from RD's expression, AJ's gettin' all flattered and charmed. There are certain stylistic choices generally made when a girl's being flattered and charmed. That's what I'm seeing here.
[these are (mild, not even really obnoxious) episode spoilers]SpoilerHuman girls put on false eyelashes, too, sometimes, Irbis. It is a Thing people do.