Who dies in glee (If u dont watch it and dont know then dont anwer with cheeky answers) 10PTS BEST ANSWER?

Well i heard its jean and i read up on that and it is Jean but umm i heard another person dies , who is it ? some people said it affects quinn , i dont know so could you help (btw glee is tonight so i would like if you can answer it before 10pm lol)