I assume you aren't talking about Lea Michele, right?Who was the young girl with long, dark hair who joined the group in the hallway? I didn't recognize her.
EDIT - One of the articles I read just said that an actress named Nina Dobrev was in that group. Apparently she's on that CW Vampire show. Her age and pictures seem to suggest she's who you might be talking about. Why she was randomly part of that group is strange--maybe even moreso than Hurley or stupid annoying Randy Jackson.