Glee 2010 Spoilers: What Song Will Neil Patrick Harris and Matthew Morrison Sing Together?

Much has been said about Neil Patrick Harris joining the cast of Glee when the show returns in April and how he will play Will’s old Glee Club rival in an episode being written by Joss Whedon.

It can now be confirmed that the song that they will sing together in a duet at the end of the episode will be “Dream On” by Aerosmith.

Wonder if Eminem will sample this version?