Question: When was the South Korean musician, singer-songwriter, record producer and actor who was the most notable front man of the band that sang 2gether born? 
Sentence (from "2gether (CNBLUE album)"): With "2gether", the band decided to change the direction of its music; it stripped itself of the acoustic tracks it was known for and explored electronic dance music in order to create a particular color and form a distinctive sound.
Relevant evidence: No