Jennifer Lawrence, 23
Sandra Bullock, 49
Melissa McCarthy, 43
 
Only three actresses starred in two home runs in 2013: Bullock pulled off a top-grossing comedy in The Heat ($230 million worldwide) and has steered Gravity to $616 million (and counting) and likely Oscar noms. Lawrence's The Hunger Games: Catching Fire took in more than $580 million in its first 12 days, and she's emerging as a frontrunner to win another Oscar for American Hustle. And McCarthy's comic appeal drove Identity Thief to $174 million worldwide and she played perfectly off Bullock in The Heat.