Hello, Jenny from the block!

Jennifer Lopez poses while Denzel Washington announces the singer, actress and Gucci model as a national spokeswoman for the Boys & Girls Clubs of America in Los Angeles on Nov. 30.

The 41-year-old wore a curve-hugging Herve Leger bandage dress (no wonder men have labeled the style the promiscuous trend) paired with nude patent-leather pumps.

The diva -- who claims to do her own makeup! -- has a personal connection to the organization: She herself is a Boys & Girls Clubs alumna.

In related news, Lopez and her hubby have announced that they will design a line for a major department store.