Jason Bateman, Tara Reid, Dick van Dyke and Gary Busey are just a few of the many cameo appearances on Scrubs over the years. Which ones did YOU like? Which ones did you hate? Discuss.

Season one
Louie Anderson - As himself, hosting Family Feud in a J.D. fantasy
Jimmie Walker - As himself
Carrot Top - As Dr. Kelso after he removes his mask, in a J.D. fantasy
William Daniels - As a hospitalized "Dr. Douglas"
Stephen Furst - As a hospitalized "Dr. Franklyn"
Ed Begley, Jr. - As a hospitalized "Dr. Bailey"
Eric Laneuville - As a hospitalized "Dr. Lamar"

Season two
Colin Hay - As an unnamed troubadour
David Copperfield - As himself in a J.D. flashback
Jay Leno - As himself on the Tonight Show, in a J.D. fantasy
Fred "Rerun" Berry - As himself in a J.D. fantasy

Season three
Tara Reid - Danny, J.D.'s girlfriend
Maureen McCormick - As herself in a J.D. marriage fantasy
Erik Estrada - As himself in a J.D. flashback
The Polyphonic Spree - As themselves, performing when a member of their band is sick
Larry Thomas - As himself
George Takei - As a priest who bears a remarkable resemblance to Mr. Sulu

Season four
Heather Graham - Dr. Molly Clock
Chuck Woolery - As himself
Sugar Hill Gang - As themselves
Cary Brothers - As himself, singing his song "Blue Eyes" in a karaoke club.
Common - As himself
Colin Farrell - As an Irish 'friend' of a patient who lived life fully.
Ed McMahon - As himself in JD's fantasy ("My Roommates", Episode 18)

Season five
Jason Bateman - J.D.'s patient
Gary Busey - As an unnamed doctor who bears a resemblance to Gary Busey
Billy Dee Williams - As himself, and J.D.'s then-girlfriend Julie's godfather
Kareem Abdul-Jabbar - As himself playing for Keith's Father's flag football team

Season six
Blue Man Group - As themselves
Scott Menville - As Gym Teacher Bunny Conscience

Season seven
Efren Ramirez - As Ricky "Caramel Bear"

Season eight
Courteney Cox - Bob Kelso's replacement as cheif of medicine

Ah, of course! I got this list from wikipedia and for some reason it only shows actors who have been in one episode or less; I added in Courteney Cox and Tara Reid afterwards. I'll make some more adjustments, Tot G!