Dramacon/Funny

Sexy Joe. That is all. Particularly his return in the third book.
Book 2:

(the group is entering the J-Pop Dance)
Monica: Hell-o pretty boys! Mama is IN THE HOUSE!
Raj: If anyone asks, we don't know her.
Hyu-Jeong: Know who?

From Book 3:

(Beth is drawing peacefully by herself when...)
Monica: (offscreen) HEY BETH!
(cut to Christie, Hyu-Jeong, Monica, and Raj striking a dramatic pose)
Monica: IT'S YOUR BEST FRIENDS EVAR!
(pause)
Beth: (to the person at the next table) I don't know those people.
(The girls Glomp Beth)

The "man in a schoolgirl outfit with hairy legs" Christie sees in Book 1 becomes a Brick Joke in Book 2, when Bethany sees the exact same thing. Christie, at this point a con veteran, tells her it could've been worse. Beth asks how, and Christie responds that he "could've dropped his heart-shaped wand and bent over to pick it up." Cue the sound of Beth's brain cracking in two.
From Book 2: Monica demands to know if Beth uses magic fairy pixie dust on her art to make it so good, and if so, where can she get some?
- And Beth's response, "Magic fairy pixie dust? Um, no..."
A Funny Background Event from Book 3. On page 121, amid the many faceless con goers, one of them has got on a wig with curly ringlets... and visible chin stubble.