Soon after that, JoJo and her mom, Jessalyn Siwa, joined the fifth season of Dance Moms, a reality show that followed the training and careers of child dancers at Abby Lee Miller’s dance company.
JoJo quickly became one of the show’s standout stars, and racked up millions of subscribers when she launched her own YouTube channel during filming.
This popularity resulted in JoJo being snapped up by Nickelodeon, and she and her mom left Dance Moms halfway through Season 6.
Source: https://www.buzzfeed.com/stephaniesoteriou/jojo-siwa-mom-bleached-hair-blonde-two-years-old