Beyoncé started her solo career with her 2003 album "Dangerously in Love".
Beyoncé's 2003 album "Dangerously in Love" marked the start of her solo career. The album featured a mix of R&B and hip-hop, and was a huge success, selling over 11 million copies worldwide. It featured the hit singles "Crazy in Love" and "Baby Boy", and it won five Grammy Awards, including Best Contemporary R&B Album. The album was a major breakthrough for Beyoncé, and it established her as one of the most successful female artists of all time.