'Beautiful' as a noun?

Hey people =) I was listening to a very good song here and I noticed something very interesting, take a look at the lyrics:

''But there's a hope that's waiting for you in the dark
You should know you're beautiful just the way you are
And you don't have to change a thing
The world could change its heart
No scars to your beautiful, we're stars and we're beautiful
Oh-oh, oh-oh-oh, oh-oh-oh-oh, oh-oh-oh''

Is 'beautiful' really being used as a noun? cuz I only know it as an adjetive. 'Beauty' and 'Beautifulness' are nouns. I also thought 'beautiful' could be an adjective for 'heart'. It's more likely... It's just a bit counfusing haha

So, If you want to listen to the song, I'm posting the link here.