[ Kaylee shows up with a present for Tony - and yes the box is tied with a cheerful, and big, red bow - and cheap liquor to add to the pile. Of course she can be seen giving the ceiling a wave not long after entering the party and saying hello to JARVIS. It's just what she does.
She's not dressed all fancy but she did brush her hair out nicely. Her smile makes up for the casual clothes, especially when she spots the glowsticks and claims one for herself. ]