Not really. In the case of musicians, they may have been performing in small clubs, writing songs, and building a local following for years. Then, one song gets radio play or goes viral on social media, and suddenly they're seen as an overnight success. But there was a long journey of learning, practice, and building their craft that preceded that sudden rise to fame.
No. Most so - called overnight success stories have years of hard work behind them. For instance, many actors seem to become famous overnight, but they've likely been through years of auditions, acting classes, and small roles before getting that big break.