 It had long been a dream in the Scrubs writer 's room to do a musical episode . Scrubs creator Bill Lawrence is a self @-@ confessed musical theatre " nerd , " as are many of the writers . In addition , many of the cast members have had backgrounds in musical theatre . According to Lawrence , " I knew that Donald [ Faison ] and Judy [ Reyes ] were Broadway @-@ style singers and dancers . I knew Sarah [ Chalke ] could dance , because she danced when she was young . I knew Zach [ Braff ] loved musical theater . I had actually seen Ken Jenkins in Big River on Broadway when I was a kid . Neil Flynn and John C. McGinley were the last two guys to admit that they 'd done a lot of musicals and stuff , but being actors , they had . Johnny C. knew how to do a Gilbert and Sullivan number , and Neil had a big baritone voice . " 
