Piper Rockelle is a multi-millionaire YouTube star with 10.5 million subscribers. However, her mother, Tiffany Smith, is under fire by former "Piper" squad members for claims of “financial exploitation.” In a lawsuit, they accuse her of exposing them to a "physical, emotional, verbal and sometimes sexually abusive environment.” A lawyer for Rockelle and her mother declined to comment, but in court papers say all allegations of wrongdoing are false.