Most entertaining celebrity Tweeters

I like Denis Leary, Albert Brooks and Steve Martin's tweets

Good suggestions.
 
Two more that have been cracking me up (though not celebrities, as far as I know):
https://twitter.com/#!/GuyEndoreKaiser
Another color blind kid just solved a Rubik's Cube in 0 seconds.
 
Your favorite musician of all time is fucking someone who can't stand to hear their songs anymore.
 
If you want to know what your porn star name would be, just start making a series of increasingly poor decisions when you're 14 years old.
 
"Wait, haha, those assholes really believed that?!" -everyone in a thousand years about the shit you are willing to die for.
 
https://twitter.com/#!/VanceDongs
Sometimes when I fuck my wife I think about myself so I won't last so long. @AdamCarolla #MiddleAgedWhiteGuyProblems #IntimateDetails
 
Explained to my son that a mechanic is like a doctor for cars. A doctor who never washes hands, has low IQ, and dates coked out strippers.
 
Fat **** working at the Osh Kosh joint just gave me the stink eye. I just wanted to know if they had any cock rings. #sheesh

Here are two accounts that never cease to make me laugh...
http://www.twitter.com/DRUNKHULK
http://www.twitter.com/God_Damn_Batman