My favorite song is called Believe it. It's main topic is precisely that, believing in your dreams. Talks about how we can reach any goal we want if we have faith in God. He is always beside us, giving us a helping hand when our efforts are not enough. It's my favorite song because all the song's teachings can be applied to one's daily life.
Everyone can reach all their dreams. There's no obstacle that they can't overcome. If we have faith in God every day, wonderful things can happen to us. If we fall, we get up and keep fighting for our dreams. The most important teaching is to never stop believing in yourself.