- Carol Hathaway: On the twelfth day of Christmas, / my true love gave to me... uhhh...
- [all the other ER docs enter and start singing]
- Dr. Doug Ross: Twelve tone deaf doctors.
- Dr. Mark Greene: Eleven lords a-lording.
- Dr. Susan Lewis: Ten drummers drumming.
- Dr. John Carter: Nine something something.
- Nurse Lydia Wright: Eight maids a-milking.
- Malik: Seven swans a-swatting.
- Harper: Six geese a-gagging.
- Everyone: Five golden rings. four calling birds, three French hens, two turtledoves, and a partridge in a pear tree.