In Hollywood, it is said, a friend is someone who stabs you in the front.

That’s the theme of the latest round of celebrity-vs.-manager lawsuits in this sometimes bitter glitter town. At the moment, comedian Garry Shandling, who’s better known for cracking up his audiences, is working on some serious courtroom material. He’s suing his former friend and manager of 18 years, Brad Grey, for $100 million over an alleged conflict of interest. Shandling says Grey — he’s a partner at Brillstein-Grey Entertainment, which produced Shandling’s former HBO series The Larry Sanders Show — used their liaison to clinch sweet deals for himself.