Zappos.com, Inc. has filed a class action lawsuit against the Walt Disney Company over false advertising. Tony Hsieh, CEO of Zappos, says it's just one battle in his efforts to prevent companies from making misleading claims.

The lawsuit alleges that Disneyland's tagline of being "The Happiest Place on Earth" is "clearly false, deceptive, and confusing to the marketplace",and cites internal Net Promoter Score (NPS) metrics that suggest that the designation should be given to Zappos.com, Inc.

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