She is known to fans, in part, for her bubbly personality and side-ponytail and colorful bow combination.But on Monday, on the eve of her seventeenth birthday, Jojo Siwa gave her 22.2 million TikTok followers a rare look at her natural hair down when she hopped on the social-networking service's viral Wipe It Down Challenge.'It's my birthday tomorrow,' the Dance Mom alum and social media influencer captioned the quick clip of her transformation.Scroll down to video Transformation: Jojo Siwa gave her 22.2 million TikTok followers a rare look at her natural hair when she did TikTok's Wipe It Down ChallengeJojo (born Joelle Joanie Siwa) followed the trend by spraying her bathroom mirror and wiping it with a towel to reveal a different look.At.