Complex sentence: He auditioned in ABSCBN's Philippine reality boyband search Pinoy Boyband Superstar, not just to become a recording artist, "but also to change the world through his music".
Split into simpler sentences: He auditioned in ABSCBN's Philippine reality boyband search Pinoy Boyband Superstar. He joined Pinoy Boyband Superstar, not just to become a recording artist, "but also to change the world through his music".