Complex sentence: According to organizers, the annual event is one of the largest music festivals held at the Hollywood Bowl in Southern California and features some of the most well-known celebrities from South Korea's K-pop music industry.
Split into simpler sentences: According to organizers, the annual event is one of the largest music festivals held in Southern California. It is held at the Hollywood Bowl in Los Angeles, and features some of the most well-known celebrities from South Korea's K-pop music industry.