There have been tons of TV shows headlined by stand-up comics over the years, but not all of them can be hits like "Seinfeld," "Ellen," "Martin," "Roseanne," or "Everybody Goes Raymond." For every stand-up sitcom success story, there are some short-lived programs that fell by the wayside. Even the most talented and popular comics couldn't make some of these shows last. Jerrod Carmichael is the latest young comic to headline a new series -- "The Carmichael Show" premieres on NBC come August 26. Will it stand the test of time? Take a look at 7 comedian-starring sitcoms you (probably) forgot about.