Complex sentence: Lovato's debut album "Don't Forget" was released on September 23,2008; it debuted at number two on the "Billboard" 200, with 89,000 copies in first-week sales.
Split into simpler sentences: Lovato's debut album "Don't Forget" was released on September 23,2008. It debuted at number two on the "Billboard" 200, with 89,000 copies in first-week sales.