Complex sentence: In 2007, Chan recorded and released "We Are Ready", the official one-year countdown song to the 2008 Summer Olympics which he performed at a ceremony marking the one-year countdown to the 2008 Summer Paralympics.
Split into simpler sentences: In 2007, Chan recorded and released the song "We Are Ready", the official one-year countdown song to the 2008 Summer Olympics. He performed the song at a ceremony marking the one-year countdown to the 2008 Summer Paralympics.