Some members of the regular cast already had extensive musical theater experience, most notably Chandra Wilson, who was in the original Broadway cast of "Caroline, or Change" and who also appeared on Broadway in such musicals as "Avenue Q" and "Chicago", and Sara Ramirez, who was in the original Broadway casts of "Spamalot," "A Class Act," and "The Capeman" and who won the 2005 Tony Award for Best Featured Actress in a Musical for "Spamalot".
Every song sung by the cast has been featured in previous episodes. Snow Patrol, 'Chasing Cars', Losing My Religion (2006); Anna Nalick, 'Just Breathe (2am)', As We Know It (2006); Gomez, 'How We Operate', Deterioration of the Fight or Flight Response (2006); Jesus Jackson, 'Running on Sunshine', I Am a Tree (2006); etc.
Avery, Yang, Derek and Webber are the only doctors who do not sing in this episode.
The lowest rated episode until season eleven