You’re never going to believe this, but Hollywood is superficial. This startling claim was brought forth by Melanie Griffith who lamented the fact that, ever since she turned 50, roles for her have dried up faster than her Juvaderm treatments. “It is what I never thought would happen when I was in my 20s and 30s, hearing actresses bitch about not getting any work when they turned 50. Now I understand it, it is just different. In a lot of ways, (Hollywood) a very superficial place,” Griffith told FOX411 while promoting her forthcoming independent dark thriller, “Dark Tourist.” “It is all about youth and beauty, for women anyway. You just…