Video: Christina Applegate's On Set Love Interest!

Lara Spencer of "The Insider" is on the set of "Samantha Who?" with Christina Applegate and her new boyfriend on the show!

Christina's character, Samantha, cozies up to the super-cute "Men In Trees" actor James Tupper who plays her love interest. He describes his character an "advocate for the angel" in Samantha.

Click on the video to see more with this on-screen couple and don't forget to watch "Samantha Who?" Mondays on ABC.