Nicole Kidman and Jennifer Aniston? Neither of them are bad actors (though Aniston's films aren't particularly good).Giving "Worst Actress Of The Decade" to someone like Paris Hilton is just another way of the voters saying "we have no balls."
Especially in a world where Jennifer Aniston, Jennifer Lopez and Nicole Kidman have made films in the last ten years.
Neither is Bullock, but the point is that they made bad films. I like Kidman, but with Bewitched and The Stepford Wives remake among others she'd have been a worthy winner. Lopez would be good; I'm unfamiliar with Aniston's oeuvre so I can't comment.
Going after Hilton is what's called "shooting fish in a barrel" as well as being a punchline that's passed its sell-by date. Does even Leno joke about her any more?