Complex sentence: Throughout 1998, during which Carey was compiling songs for her first compilation album, "Number 1's", "Underneath the Stars", alongside "Breakdown", led to a publicized conflict with Columbia Records.
Split into simpler sentences: Throughout 1998, Carey was compiling songs for her first compilation album, "Number 1's". The album, alongside "Underneath the Stars" and "Breakdown", led to a publicized conflict with Columbia Records.