Hard at work on her popular Friday night TV show, Jennifer Love Hewitt was spotted on the set of "Ghost Whisperer" in Los Angeles on Monday (December 1).

Dressed in black, the "I Know What You Did Last Summer" siren was all smiles as she ran through scenes with her fellow cast members.

In related news, Jennifer teamed up with Freddie Prinze Jr for a brand new animated adventure movie named "Delgo" - due to hit theaters December 12th.

According to a studio press release, "Delgo takes place in the magical land of Jhamora, which is divided between two cultures - the Nohrin, winged masters of the skies, and the Lockni, who harness the mystical powers of the land. The epic scope of the film is brought to life with lush, rich environments, otherworldly creatures and a unique color palette."

Gossip Girls

Enjoy the pictures of Jennifer Love Hewitt on the set of "Ghost Whisperer" (December 1).