Still plugging away at her new film “The Back-Up Plan,” Jennifer Lopez was spotted on the Los Angeles set yesterday (June 12) with two very adorable guests.

The “Waiting for Tonight” songstress enjoyed a visit from her beautiful baby twins Max and Emme during a break in shooting.

J. Lo looked very pleased to be hanging out with her little ones as she chatted with a gal pal in between scenes.

“The Back-Up Plan” is about a woman who finally decides to get pregnant via artificial insemination only to meet the man of her dreams on the very same day.