AceShowbiz -

How would celebrities react to mean tweets directed at them? The question was answered when Justin Bieber and Kristen Stewart read the haters' messages on "Jimmy Kimmel Live!" recently. Both showed different reactions.

"Dear god, give us 2pac back and we'll give you Justin Bieber," the Canadian star read before staring expressionlessly at the camera. Stewart adjusted her pants like a man did after reading, "I liked Kristen Stewart more when she was a boy."

Matt LeBlanc said with laugh, "Go f*** yourself," after reading a short message of "Matt LeBlanc looks so old #whathappened." Matisyahu, meanwhile, said "thanks" after reading, "Ever since @matisyahu shaved, he looks like old, fat Justin Bieber."

Other stars who appeared on "Celebrities Read Mean Tweets" edition included James Van Der Beek, Katy Perry, Zooey Deschanel, Larry King, David Spade and Snooki. Their reactions can be watched in the following video "for your amusement, and hopefully, reflection."