5.When she had Puck, Jesse, and Finn do a music video of "Run Joey Run" with her so it would look like all the boys were fighting over her.
6.When she sent Sunshine Corazón to a crack house instead of telling her where glee club practice was because she was threatened by the possibility of another talented singer taking her spotlight...
7....and when she told Mike and Tina that she did it so that their dancing contributions wouldn't be "even more insignificant" to the club.
8.When she put tape on her mouth in "silent protest" because she wasn't getting a solo for a competition.
9.When she cheated on Finn with Puck, his best friend, after finding out that Finn had slept with Santana when he and Rachel weren't dating.
10.When she pursued Blaine, knowing that Kurt really liked him.
11.When she ran for class president against Kurt, not because she had any kind of platform she wanted to implement, but because she thought she hadn't gotten the lead in West Side Story and wanted to put it on her college application...
12....and when she felt guilty about it and stuffed the ballot box so he'd win, which got him disqualified.
13.When she and Mercedes both auditioned for Maria in West Side Story and Rachel acted like the role was hers to lose.
14.When she lived in New York City with Kurt and treated him horribly.
15.When she had a completely absurd reaction when Santana auditioned to be her understudy in Funny Girl in Season 5, ending their friendship and moving out of their apartment.
16.When she told Kurt — a gay man who she'd witnessed be horrifically bullied in high school for being out — that he never took risks when he suggested that dropping out of college was a bad idea.
17.When she skipped her Funny Girl performance without giving anyone a heads up to go audition for a TV pilot in Los Angeles, because she decided she was too big for Broadway.