The Supreme Court has upheld a new law that could ban TikTok in the U.S. unless its Chinese parent company divests from the very popular video-sharing social media app. The justices said the "Protecting Americans from Foreign Adversary Controlled Applications Act" doesn't violate the First

The app had more than 170 million monthly users in the U.S. The black-out is the result of a law forcing the service offline unless it sheds its ties to ByteDance, its China-based parent company.

The 170 million TikTok users in the U.S. were in for a rude awakening late Saturday night when the enormously popular video-sharing app became inaccessible because of a law passed by a bipartisan majority in Congress last year.