The Issue: Las Vegas columnist Maren Wade filed a federal trademark lawsuit against Taylor Swift in California, alleging that Swift's branding for The Life of a Showgirl creates reverse confusion with Wade's federally registered mark, "Confessions of a Showgirl." According to news reports, the USPTO had already issued an initial refusal of Swift's application, citing Wade's mark.
The Source: https://apnews.com/article/taylor-swift-showgirl-lawsuit-1e65b44eb6cca03297a712f1d247e3bf
The Takeaway: There's generally a lot of risk in choosing to keep using a name for your brand or business after the USPTO has flagged it as confusingly similar to a federally registered name. And not everyone has Taylor Swift levels of wealth to fall back on.