On Monday, March 8, Nickelodeon's Yo Gabba Gabba! will return for it's star-studded third season.Monday's theme is Circus with Weird Al Yankovic playing the ringmaster, Sarah Silverman teaching "Time to Mime" and Jack McBrayer and Paul Scheer telling a "Knock Knock" joke.

Sarah Silverman on "Yo Gabba Gabba!" from NickPress on Vimeo.Other stars to appear on season 3 of Yo Gabba Gabba! are: Weezer, Mos Def, Solange Knowles, Mix Master Mike and many more.YoGabba-Sarah-SilvermanDon't forget to tune in to Nickelodeon on Monday, March 8 @ 10:30 am.