[1] The episode also introduced recurring guest star Darren Criss as Blaine Anderson, lead singer and junior member of the group.

[1] Performing a cover version of Katy Perry's "Teenage Dream" with Criss on lead vocals, the actors who portrayed the Warblers lip synced to background vocals provided by the Beelzebubs, an all-male a cappella group from Tufts University in Medford, Massachusetts, who did not appear onscreen.

[2][3] Some of the actors who played Warblers in the second season, including Hall and Mega, returned for the third.

Singles by the Warblers, with series stars Criss and Chris Colfer performing lead vocals, have collectively sold over 1.3 million copies through March 2011.

[5] Their first album, Glee: The Music Presents the Warblers, released by Columbia Records on April 19, 2011, debuted at number two on the US Billboard 200 and number one on Billboard's Soundtracks chart, selling 86,000 copies in its first week.