Ruined by Ali Larter miscasting

Granted, the producers of the movie obviously didn't have the budget or the
clout to go after an A-List actress, but it seems like Ali Larter must have
been on the very bottom of a long list of actresses who turned them down.
In order to work , this movie desperately needed an actress with real
romantic comedy chops...someone who can stay adorable and sympathetic even when the script is forcing her to behave like a bitch-diva. (such as Meg
Ryan, Reese Witherspoon, Julia Roberts, Katherine Heigl, etc, etc). Larter
has none of those skills....she's more like a rom-com villainess who stumbled
into the wrong movie...you know, the raging bitch fiance who finally gets dumped at the altar when the rom-com leading man comes to realize his true love is Reese/Julia/Meg/Katherine.
Her miscasting throws the whole film seriously out of whack. If the
director and casting director had worked a little harder, found themselves
a real genuine singing, dancing American cutie-pie, they could have made a
delightful movie, with a real shot at theatrical exhibition instead of the
usual two-years-on-the-shelf-before-direct-to-DVD trajectory. (And by the end of the movie, when they start slathering make-up on Larter as if it were
housepaint..it's just grotesque.)