Monica is beautiful but she is also a terrible actress
Yeah, she is gorgeous but...
You maybe can't realize it because I guess she is dubbed outside Italy but the general consesus is that she is mediocre to say the least, as an actress.
That's probably why she doesn't get so many roles.
I will never forget watching Matrix Reloaded (not that great, BTW) in a full theatre: as soon as she started talking, her very first line in the movie, the whole crowd started to laugh histerically so unconvincing she was.
I've never seen such a reaction my whole life, really.