Scrubs Guest Stars: Season Four 

Come on in and read the skinny on four of Scrubs coolest guest stars from season four, which include Heather Graham, Colin Farrell, Mathew Perry, and Clay Aiken. Yes, even he of American Idol fame has had a guest spot on Scrubs.
Keywords: scrubs, guests stars, season four, heather graham, colin farrell, mathew perry, clay aiken, american idol, joshua cook, television sitcom