Rappers Snoop Dogg, Ludacris and former NBA star Shaquille O'Neal have just been added to the list of those who will hit pop star Justin Bieber with their best burn during Comedy Central's roast of the Biebs, which is set to air March 30.

Among the other roasters scheduled to show up are comics Hannibal Buress, Kevin Hart and Natasha Leggero. Bieber took to Twitter Monday to get actor Seth Rogen to sign on for the roast. Rogen has yet to respond to Bieber's pleas. But Martha Stewart -- yes, that Martha Stewart -- has reportedly signed on for the event.

Where was Elaine?

Jerry Seinfeld, Jason Alexander and Michael Richards had a "Seinfeld" reunion at the inaugural Los Angeles Fatherhood Initiative lunch on Wednesday to benefit Baby Buggy, a charity that provides child care essentials to families in need.

Seinfeld hosted the event at the Palm Restaurant in Beverly Hills, California. The three men were photographed hamming it up for the camera. Fellow castmember Julia Louis-Deyfrus was absent.

"When Jerry calls, I go!" Jason Alexander said, according to Variety. The trio, plus Louis-Dreyfus, starred in the classic sitcom "Seinfeld" from 1989 to 1998.

Baby Buggy was founded in 2001 by Jessica Seinfeld, the comedian's wife, and the luncheon raised nearly $250,000, according to Variety.

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