They help raise money for less fortunate kids, or sick children in the developing world.
Or, like Justin, the stand up for animals rights. Justin Bieder is taking advantage of his fame to spread the word about taking care of abandoned pets. He believes in adopting animals from the animal shelter and has collaborated with the organization PETA to take a stand for what he cares about.
Justin knows that animals that end up in the pound suffer, and that's why he wants to do all he can to motivate people to adopt a pet.
His motto for his campaign to raise awareness for animals is the following: " My world includes compassion for animals. Yours should too."