How Much Is a Celebrity Endorsement Really Worth?

Following the news that actress Cameron Diaz is releasing a fitness book Bloomberg examines how much a celebrity endorsement is worth.

Solar Impulse 2 Completes Global Epic Journey
31:55 - Solar Impulse 2 has made history, completing the first around the world flight using only the power of the sun. Bloomberg's Desley Humphrey reports on "Daybreak Asia." (Source: Bloomberg)
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