Complex sentence: The only Western artist who had previously worked with Hamasaki was Armin van Buuren; who remixed "Appears" for hr 2001 album "Ayu Trance", which was also released as a A-side single in Germany in 2005.
Split into simpler sentences: The only Western artist who had previously worked with Hamasaki is Armin van Buuren, who remixed "Appears" for Hamasaki's 2001 album "Ayu Trance". The track was released as a A-side single in Germany in 2005.