A copycat is someone who acts just like someone else or copies another person's work.

VOA: special.2009.09.27

"Another way of looking at it is that a free agent in a sports league is the same thing as anybody else in the United States labor market.

VOA: special.2010.07.26

"I wish there were more people like him putting a spotlight on how important it is to volunteer, to just help one another, try to put yourself in somebody else's position."

VOA: standard.2010.07.06

"The doctor appears one way, in scene four it's another way, in scene 10 it's something else and it is something that intrigued me a great deal so I sort of gave myself to the material along with the actors.

VOA: standard.2010.02.27