'Guilt Trip': On the road with Seth and La Strei

All hail Caesars Palace

July 14, 2010

Somehow, Andy and Joyce make it to their Las Vegas destination in one piece. Even when the camera wasn't rolling, though, Rogen found the perfect way to annoy his co-star -- who also just happens to be a legendary songstress as well: He sang. A lot. " I would get bored and start singing on the set and she would hate it. I have a really bad voice and she has a really good voice. Some of that seeped into our performances, I think." Other than his off-key warbling, though, "We got on really well."