Lindsay Arnold is proof that the fashion show must go on. Just minutes before going live on HSN in support of Volition Beauty, the Dancing With the Stars professional dancer, 31, discovered something about her body. "Little did she know she would start her [period] in these white pants 15 min before going on live television," Arnold captioned a TikTok video on Thursday, July 17, while showcasing an all-white fit. Ultimately, Arnold pushed through and went live on the massive home shopping network. And yes, she had a little fun on social media after the ordeal.