Comedian Greg Giraldo, one of the regular Comedy Central celebrity roasters and judge of Last Comic Standing, has died today at the age of 44. Giraldo had been hospitalized in New Brunswick, NJ after he accidentally overdosed on prescription pills last weekend. His overdose came hours after he performed at a rally to mark National Alcohol and Drug Addiction Recovery Month.

Sources told TMZ, "Greg passed away today at the hospital in New Brunswick as a result of an accidental overdose. His family was by his side." You can read some one-liner highlights of his roasts here and here, and listen/watch some of his monologues on his website. And you can watch a host of his roast appearances here, and more stand-up videos here. Below is a video of him roasting Joan Rivers.