In this time of economic uncertainty and the potential evaporating of the old, reliable Hollywood star system, some math nerds may have saved the jobs of ten lucky actresses. Forbes Magazine has recently completed its annual list of female stars that provide the most bang for the buck. Their poll process is pretty complex. To qualify, actors must have appeared in at least three movies over the past five years that opened on 500 screens or more. Someone then adds up and averages the actors' salary on each film, each film's budget and each film's final gross. This year's winner: Naomi Watts, who earned $44 for each $1 she was paid. Despite starring in interesting movies like The Painted Veil, Funny Games and Eastern Promises, it looks as if Watts' place on the list was snagged mostly by King Kong, which earned $550 million worldwide.