10. "i remind myself that the actors who take those roles" In response to In response to 0
are costumed and made up to appear 'ugly' usually for the first 2 acts of the movie and are often made up to appear 'beautiful' in the final act. classic 'Ugly Duckling' storyline. we all remember that story - http://en.wikipedia.org/wiki/The_Ugly_Duckling. i expect this DUFF movie is yet another re-telling of The Ugly Duckling w/some twist added.
and i also know that actors who play 'beauty' generally are also made up and costumed just like actors are made up to play 'ugly'.