LeBron JamesPhoto: Mansoor Ahmed/WireImage.com

Photo: Mansoor Ahmed/WireImage

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LeBron James, U.S., Basketball

The Cavaliers’ superstar forward LeBron James not only passed Olympic muster this year, but also met SpongeBob SquarePants’ approval. The two celebs have teamed up as part of Nickelodeon’s Big Green Help campaign aimed at encouraging kids to go green.