Jen impresses 'Horrible Bosses' co-star

Jennifer Aniston shocked co-star Charlie Day with her performance in 'Horrible Bosses'.

The actress stars in the movie as a sexually-aggressive dentist and the actor – who plays Dale, an employee the subject of Jennifer's character's advances - admits he was astonished at how convincing she was in the role, but thinks his disbelief was good for the movie.