Complex sentence: The Wish was launched in Japan in January 2003, under a massive publicity campaign with Japanese singer Hikaru Utada singing the TV commercial's music (It's her song Colors) and also coinciding with the launch of her new CD-single.
Split into simpler sentences: The Wish was launched in Japan in January 2003, under a massive publicity campaign with Japanese singer Hikaru Utada. The TV commercial features her song Colors, which coincides with the launch of her new CD-single.