The WireImage Entertainment Report: 4/14/08

All the latest entertainment news including stories with Britney Spears, Jon Stewart, Sarah Silverman, Rosie O'Donnell, Tina Fey, Amy Poehler, Jonah Hill, Matthew Broderick, Susie Essman, Jackie Chan, Jet Li, Michael Angarano and Mario Lopez in a daily rundown of WireImage's unique coverage of everything entertainment.