Famous Cupcakes has two locations: Beverly Hills and North Hollywood. They sell all-natural and organic cupcakes, available in all of the usual flavors. I haven't been here before, but the reviews on Yelp lead me to believe that the cupcakes are pretty decent.
The Kardashians have been promoting Famous Cupcakes for the past few months. (I wonder if they are part-owners or something like that.) This Friday (February 19, 2010) Kim Kardashian will be at the Beverly Hills location of Famous Cupcakes from 1:00-2:00pm to promote her new cupcake mix.
UPDATE: Famous Cupcake's website has been updated with info about the cupcake mixes. Each vanilla cupcake mix includes: vanilla cupcake mix, frosting recipe, cupcake liners, and pink sugar crystals. Each mix is $10.00 and yields 18 cupcakes.