Tonight marks Alanis Morissette's debut on Weeds, playing Nancy's empathetic obstetrician. Morissette got her start on TV (remember You Can't Do That on Television?), but she hasn't done a ton of acting since. I've generally been a fan whenever she has appeared on screen, though, including as God in Dogma. Morissette's Weeds role got me thinking about other great on-screen performances from musicians, whether or not they're commonly considered strong actors. Read on for a dozen of my favorites.