Comedian Kathy Griffin played a woman named Babs Duffy on crime show, 'Law and Order: SVU.'
When you think about Justin Bieber, what comes to mind? A few obvious things: Pop star, hit maker, Selena Gomez's boyfriend, etc.
How about guest star on 'CSI'? Didn't think so!
Click through the gallery to see 10 of the most unexpected celebs—including Kathy Griffin, Nicole 'Snooki' Polozzi, Shakira and more!—to ever make a small screen guest appearance!