Demi Lovato hits up the Drama Free School Year assembly at The Young Women’s Leadership School on Thursday morning (September 20) for a really exciting announcement in East Harlem, New York City.

The 20-year-old singer and X Factor judge was just appointed as the new “Mean Stinks” ambassador!

“I heard about the program last year, and thought it was such a great opportunity,” Demi shared. “They’re really trying to put an end to bullying.”

During the assembly, the program asks girls to pledge to have a “Drama Free School Year” by making a pinky swear, symbolized by wearing blue nail polish on their pinky fingers.

Demi added, “I’ll definitely be wearing [the nail polish] starting soon. It’s a conversation starter: ‘Hey, why is your pinky blue?’ ‘This is a pinky promise that I’m not going to bully people, that me and my friends are ganging up for good.’ ”

10+ pics inside…