It's Most Beautiful Endless Forms, as spoken by Yoda.
If you consider "Forms Most Beautiful" as an entire subject, it could be correct. If it's Endless Forms, Most Beautiful...then that makes no fucking sense. Seriously, are they trying to out-Sabaton Sabaton here?
The grammar is fine, albeit a little archaic. "Forms" is the noun, not the verb. The forms are endless and most beautiful (and most wonderful). See the Darwin quote (in NP's post) on which the title is based.I speak English grammar not.
I love that! It seems most female singers are all dime a dozen for me and very few of them stand out the way quite a few male singers each have their own unique style. But she is really original sounding! Here's another unique singer: