As it turned out, the girl who insulted Jenny was none other than Karyn! In the new reality where Jon was a cheerleader girl named Jenny (and friends with Sarah McMillan), Karyn was no longer a friend. She had hooked up with a different crowd of people, mainly girls who were tomboys like her, and had developed more of an aggressive attitude towards the "popular" crowd, which Jenny was now a part of.
But now, after her insult (she was already blond, because of a wish, but now she was a total ditz too), was she still viewed the same by her "new" friends? Was she still a tomboy? Was there such a thing as a ditzy tomboy? Or had her life made yet another somewhat drastic change?