Don't have a cow man! Today Nancy Cartwright visits Rob—and brings a lot of familiar voices with her. On this episode find out how Nancy went from auditioning for Lisa, but getting Bart, who the stars of The Simpsons really were, and a look at how voices change over time. All of this and Rob asks Nancy a vocal question she's never been asked before, on Literally! Got a question for Rob? Call our voicemail at (323) 570-4551. Yours could get featured on the show!