10. Kurt and Blaine Have Trouble in Paradise   Kurt (Chris Colfer) and Blaine (Darren Criss) have the romance that all Gleeks have been rooting for since we first heard Blaine sing about his skin tight jeans, but the producers clearly think it's time to shake things up. Enter Sebastian (Grant Gustin) the charming new Warbler with his eye on Blaine. However it's clear that no one messes with Kurt, and things are sure to get interesting over the season as Sebastian gets increasingly comfortable with expressing his feelings.