'Glee': 'Comeback' spoilers--Justin Bieber and 'Rent'

We will still be waiting over two more weeks until "Glee" returns with the Super Bowl show. But the internet is already buzzing about a different episode. Titled "Comeback," the 35th show will air later this season. So why all of the early buzz?
"Comeback" won't be a tribute episode but it will reportedly feature three different Justin Bieber songs. According to new spoilers, out today, the 16-year-old's music will be performed by Chord Overstreet and some of the other "Glee" guys. The "Glee" newcomer will reportedly even imitate the "Baby" singer's hair for this show.
Ryan Murphy recently explained why the show will not be a tribute to Bieber: “Those [tributes] are reserved for artists with big catalogs. Bieber comes up in episode 13 as a small plot point. Sam (Chord Overstreet) sings a JB song to win Quinn’s (Dianna Aragon) approval.”
Music from "Rent" will also play a central role as Mercedes and Rachel battle it out for head diva. The specific song selection has yet to be revealed.