Blockbuster drama, IRIS has seen its fair share of big-name singers lending their vocals to the soundtrack, including the likes of Baek Ji Young, Shin Seung Hun, Kim Tae Woo, Big Bang, Seo In Young among others. With IRIS ending this week, Taewon Entertainment has revealed on the 14th that Lee Jung Hyun (AVA) will be singing the finale's theme song titled "How do I hold back the tears". The song was composed by famous song composer, Lee Min Soo and will see Lee Jung Hyun tackle a ballad song for the first time in a long while as she's more known for her uptempo dance tracks. It is said that Lee Jung Hyun's sensual vocals accompanied by the orchestra instruments contributed to an awesome feeling when listening to it. Actor, Jung Jun Ho actually teared after listening to it for the first time. The song will make it's debut on the 16th on the internet, just in time for the finale of IRIS on the 17th. Stay tuned for the drama's mindblowing conclusion!