Complex sentence: Everybody was surprised by the quality of his voice, and decided to make him the lead singer of the band and spent about a year writing new songs, thinking of a new name and concept; this progress being the Vice Versa-to-ABC transformation.
Split into simpler sentences: Everybody was surprised by the quality of his voice, and decided to make him the lead singer of the band. The group then spent about a year writing new songs and thinking of a new name and concept; this progress being the Vice Versa-to-ABC transformation.