Jack Black executive produces and guest stars alongside Amanda Lund and Maria Blasucci in hilarious new web series on Yahoo! Screen. ‘Ghost Ghirls’ premieres September 9th as part of the Yahoo! fall comedy line-up. Guest stars: Molly Shannon, Val Kilmer, Dave Grohl, Jason Ritter, Jason Schwartzman, and many more! http://screen.yahoo.com/ghost-ghirls/ […]