Eugh. The show will be hopefully be cancelled next year. If a half naked Chord Overstreet can't save the falling rating's then I don't know what can.
They had a #1 single on iTunes until yesterday, a sold-out summer tour in both US and UK and the second season of a Glee-based talent show. I bet they'll arrive at 5 season at least They're even planning spin-off series for the graduated characters