TV/Line was first with the news that the producers are planning a Justin Bieber tribute episode for the musicomedy show. M-Net does have the rights for the second season of Glee but when I asked this morning the pay broadcaster told me it the second season of this great show will definitely go out in 2011, although there's no specific broadcasting starting date yet.
Chord Overstreet who plays Sam Evans on Glee of course shares blond sideswept-bangs with The Biebs, making it highly possible that he'll be the one belting out some baby tunes in this specific episode.