From the immediate aftermath of 9/11 to today stand-up comedians, talk-show hosts, sketch performers, television animators and other entertainers have used often-controversial jokes to unite and heal in the face of tragedy.

Meet the most beloved sitcom horse of the 90s - 20 years later. BoJack Horseman was the star of the hit TV show "Horsin' Around," but today he's washed up, living in Hollywood, complaining about everything, and wearing colorful sweaters.

Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa and Maggie, as well as a virtual cast of thousands. Since the beginning, the series has been a pop culture icon, attracting hundreds of celebrities to guest star. The show has also made name for itself in its fearless satirical take on politics, media and American life in general.