The wildly successful social media/video app TikTok no longer works in the US as of 10:00pm CST on Saturday, January 18. TikTok, the successor to Musical.ly, exploded in popularity during the pandemic, quickly becoming one of the world's most-used apps. Hundreds of millions of individuals use TikTok on a daily basis, but unfortunately for its fans, the app has been a political target for years now.