This has got to be one of the greatest casting coups of all time. Carol Burnett is guest starring in Season 2 of Glee as -- get this -- Sue Sylvester's mother! Sue (played by the hilarious Jane Lynch) mentioned in an episode in Season 1 that her parents were rarely around when she was growing up, because they were "famous Nazi hunters." EW's Ausiello Files first nabbed the … [Read more...]