Do UCs Look At Your Art Supplement First?

Hi,

I will be applying to UCLA, UCSB, and more for the dance major. Do UCs look at my art supplement as the determining factor, then review my academics after they’ve reached a decision about me in the dance major? Also, if I don’t get in for the dance major, would they consider me for undeclared or a second choice major? I know UCLA is stricter on looking at an application again for your second choice major, but I’m unsure if they’d give any considerations.