Demi Lovato's fans heart her -- big time.
On the same day we told you that Demi (and Corbin Bleu, Colbie Caillat, plus more stars) designed t-shirts and tanks for Forever 21 that would benefit Starlight Children's Foundation, Demi tweeted this message to her over one million followers:
"During this Holiday season help kids with cancer by purchasing a shirt I designed."
And, wow, did her fans listen and get excited. They showed their enormous support for their favorite celeb and Starlight Children's Foundation by purchasing Demi's tank top and now it's already sold out online.
Late last night Demi showed her appreciation by posting a photo of her shirt on Twitter and tweeting to her fans, "Thank you Forever21 for letting me design a tank top!!"
Check your local Forever 21 store if you want Demi's tank, or go here to buy a shirt designed by other celebs.