4. Julia Roberts - The Proposal
The Proposal was a hugely successful and surprisingly enjoyable romantic comedy that starred Sandra Bullock and Ryan Reynolds, doing the old pretending to be engaged for a green card bit. It could have starred Julia Roberts, but she reportedly turned down the role after being asked to take a pay cut. While she's a decent actress, she's a few years out of relevance to be demanding millions, especially while the film industry was hit by the same recession as everyone else and most A-List actors were being paid far less than their usual quote. I would argue that her last good film was Ocean's 11, which came out twelve years ago. Interestingly enough, she passed on The Blind Side, a role which also went to Bullock and even earned her an Oscar. It seems like she's learned her lesson, though -- her slate for the next year or so includes August: Osage County and The Normal Heart, two prestigious stage-to-film adaptations.